update examples with difficulty stars (#4694)

* update examples with difficulty stars

* manual fix script issues

* manual fix script issues

examples/audio/audio_mixed_processor.c

@@ -2,6 +2,8 @@
 *
 *   raylib [audio] example - Mixed audio processing
 *
+*   Example complexity rating: [★★★★] 4/4
+*
 *   Example originally created with raylib 4.2, last time updated with raylib 4.2
 *
 *   Example contributed by hkc (@hatkidchan) and reviewed by Ramon Santamaria (@raysan5)

examples/audio/audio_module_playing.c

@@ -2,6 +2,8 @@
 *
 *   raylib [audio] example - Module playing (streaming)
 *
+*   Example complexity rating: [★☆☆☆] 1/4
+*
 *   Example originally created with raylib 1.5, last time updated with raylib 3.5
 *
 *   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,

examples/audio/audio_music_stream.c

@@ -2,6 +2,8 @@
 *
 *   raylib [audio] example - Music playing (streaming)
 *
+*   Example complexity rating: [★☆☆☆] 1/4
+*
 *   Example originally created with raylib 1.3, last time updated with raylib 4.0
 *
 *   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,

examples/audio/audio_raw_stream.c

@@ -2,6 +2,8 @@
 *
 *   raylib [audio] example - Raw audio streaming
 *
+*   Example complexity rating: [★★★☆] 3/4
+*
 *   Example originally created with raylib 1.6, last time updated with raylib 4.2
 *
 *   Example created by Ramon Santamaria (@raysan5) and reviewed by James Hofmann (@triplefox)

examples/audio/audio_sound_loading.c

@@ -2,6 +2,8 @@
 *
 *   raylib [audio] example - Sound loading and playing
 *
+*   Example complexity rating: [★☆☆☆] 1/4
+*
 *   Example originally created with raylib 1.1, last time updated with raylib 3.5
 *
 *   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,

examples/audio/audio_sound_multi.c

@@ -2,6 +2,8 @@
 *
 *   raylib [audio] example - Playing sound multiple times
 *
+*   Example complexity rating: [★★☆☆] 2/4
+*
 *   Example originally created with raylib 4.6
 *
 *   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,

examples/audio/audio_stream_effects.c

@@ -2,6 +2,8 @@
 *
 *   raylib [audio] example - Music stream processing effects
 *
+*   Example complexity rating: [★★★★] 4/4
+*
 *   Example originally created with raylib 4.2, last time updated with raylib 5.0
 *
 *   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,

examples/core/core_2d_camera.c

@@ -2,6 +2,8 @@
 *
 *   raylib [core] example - 2D Camera system
 *
+*   Example complexity rating: [★★☆☆] 2/4
+*
 *   Example originally created with raylib 1.5, last time updated with raylib 3.0
 *
 *   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,

examples/core/core_2d_camera_mouse_zoom.c

@@ -2,6 +2,8 @@
 *
 *   raylib [core] example - 2d camera mouse zoom
 *
+*   Example complexity rating: [★★☆☆] 2/4
+*
 *   Example originally created with raylib 4.2, last time updated with raylib 4.2
 *
 *   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,

examples/core/core_2d_camera_platformer.c

@@ -2,6 +2,8 @@
 *
 *   raylib [core] example - 2D Camera platformer
 *
+*   Example complexity rating: [★★★☆] 3/4
+*
 *   Example originally created with raylib 2.5, last time updated with raylib 3.0
 *
 *   Example contributed by arvyy (@arvyy) and reviewed by Ramon Santamaria (@raysan5)

examples/core/core_2d_camera_split_screen.c

@@ -2,6 +2,8 @@
 *
 *   raylib [core] example - 2d camera split screen
 *
+*   Example complexity rating: [★★★★] 4/4
+*
 *   Addapted from the core_3d_camera_split_screen example: 
 *       https://github.com/raysan5/raylib/blob/master/examples/core/core_3d_camera_split_screen.c
 *

examples/core/core_3d_camera_first_person.c

@@ -2,6 +2,8 @@
 *
 *   raylib [core] example - 3d camera first person
 *
+*   Example complexity rating: [★★☆☆] 2/4
+*
 *   Example originally created with raylib 1.3, last time updated with raylib 1.3
 *
 *   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,

examples/core/core_3d_camera_free.c

@@ -2,6 +2,8 @@
 *
 *   raylib [core] example - Initialize 3d camera free
 *
+*   Example complexity rating: [★☆☆☆] 1/4
+*
 *   Example originally created with raylib 1.3, last time updated with raylib 1.3
 *
 *   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,

examples/core/core_3d_camera_mode.c

@@ -2,6 +2,8 @@
 *
 *   raylib [core] example - Initialize 3d camera mode
 *
+*   Example complexity rating: [★☆☆☆] 1/4
+*
 *   Example originally created with raylib 1.0, last time updated with raylib 1.0
 *
 *   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,

examples/core/core_3d_camera_split_screen.c

@@ -2,6 +2,8 @@
 *
 *   raylib [core] example - 3d cmaera split screen
 *
+*   Example complexity rating: [★★★☆] 3/4
+*
 *   Example originally created with raylib 3.7, last time updated with raylib 4.0
 *
 *   Example contributed by Jeffery Myers (@JeffM2501) and reviewed by Ramon Santamaria (@raysan5)

examples/core/core_3d_picking.c

@@ -2,6 +2,8 @@
 *
 *   raylib [core] example - Picking in 3d mode
 *
+*   Example complexity rating: [★★☆☆] 2/4
+*
 *   Example originally created with raylib 1.3, last time updated with raylib 4.0
 *
 *   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,

examples/core/core_automation_events.c

@@ -2,6 +2,8 @@
 *
 *   raylib [core] example - automation events
 *
+*   Example complexity rating: [★★★☆] 3/4
+*
 *   Example originally created with raylib 5.0, last time updated with raylib 5.0
 *
 *   Example based on 2d_camera_platformer example by arvyy (@arvyy)

examples/core/core_basic_screen_manager.c

@@ -2,6 +2,8 @@
 *
 *   raylib [core] examples - basic screen manager
 *
+*   Example complexity rating: [★☆☆☆] 1/4
+*
 *   NOTE: This example illustrates a very simple screen manager based on a states machines
 *
 *   Example originally created with raylib 4.0, last time updated with raylib 4.0

examples/core/core_basic_window.c

@@ -2,6 +2,8 @@
 *
 *   raylib [core] example - Basic window
 *
+*   Example complexity rating: [★☆☆☆] 1/4
+*
 *   Welcome to raylib!
 *
 *   To test examples, just press F6 and execute 'raylib_compile_execute' script

examples/core/core_custom_frame_control.c

@@ -2,6 +2,8 @@
 *
 *   raylib [core] example - custom frame control
 *
+*   Example complexity rating: [★★★★] 4/4
+*
 *   NOTE: WARNING: This is an example for advanced users willing to have full control over
 *   the frame processes. By default, EndDrawing() calls the following processes:
 *       1. Draw remaining batch data: rlDrawRenderBatchActive()