[rshapes] Add some missing Draw*LinesEx() functions and new example shapes_outlines_testbed (#6072)

* [rshapes] Add `DrawEllipseLinesEx()`

Add DrawEllipseLinesEx() to the API for consistency with other shape drawing functions.

* [rshapes] Add `DrawTriangleLinesEx()`

Add DrawTriangleLinesEx() to the API for consistency with other shape drawing functions.

* [rshapes] Add `DrawCircleSectorLinesEx()`

Add DrawCircleSectorLinesEx() to the API for consistency with other shape drawing functions.

* [rshapes] Add `DrawRingLinesEx()`

Add DrawRingLinesEx() to the API for consistency with other shape drawing functions.

* [examples] Add shapes_outlines_testbed

This example stress tests the previously existing and newly added shape outline functions.

src/raylib.h

@@ -1284,6 +1284,7 @@ RLAPI void DrawLineDashed(Vector2 startPos, Vector2 endPos, int dashSize, int sp
 RLAPI void DrawTriangle(Vector2 v1, Vector2 v2, Vector2 v3, Color color);                                // Draw a color-filled triangle, counter-clockwise vertex order
 RLAPI void DrawTriangleGradient(Vector2 v1, Vector2 v2, Vector2 v3, Color c1, Color c2, Color c3);       // Draw triangle with interpolated colors, counter-clockwise vertex/color order
 RLAPI void DrawTriangleLines(Vector2 v1, Vector2 v2, Vector2 v3, Color color);                           // Draw triangle outline, counter-clockwise vertex order
+RLAPI void DrawTriangleLinesEx(Vector2 v1, Vector2 v2, Vector2 v3, float thick, Color color);            // Draw triangle outline with line thickness, counter-clockwise vertex order
 RLAPI void DrawTriangleFan(const Vector2 *points, int pointCount, Color color);                          // Draw a triangle fan defined by points (first vertex is the center)
 RLAPI void DrawTriangleStrip(const Vector2 *points, int pointCount, Color color);                        // Draw a triangle strip defined by points
 RLAPI void DrawRectangle(int posX, int posY, int width, int height, Color color);                        // Draw a color-filled rectangle
@@ -1306,6 +1307,7 @@ RLAPI void DrawCircleV(Vector2 center, float radius, Color color);
 RLAPI void DrawCircleGradient(Vector2 center, float radius, Color inner, Color outer);                   // Draw a gradient-filled circle
 RLAPI void DrawCircleSector(Vector2 center, float radius, float startAngle, float endAngle, int segments, Color color); // Draw a piece of a circle
 RLAPI void DrawCircleSectorLines(Vector2 center, float radius, float startAngle, float endAngle, int segments, Color color); // Draw circle sector outline
+RLAPI void DrawCircleSectorLinesEx(Vector2 center, float radius, float startAngle, float endAngle, int segments, float thick, Color color); // Draw circle sector outline with thickness
 RLAPI void DrawCircleLines(int centerX, int centerY, float radius, Color color);                         // Draw circle outline
 RLAPI void DrawCircleLinesV(Vector2 center, float radius, Color color);                                  // Draw circle outline (Vector version)
 RLAPI void DrawCircleLinesEx(Vector2 center, float radius, float thick, Color color);                    // Draw circle outline with line thickness
@@ -1313,8 +1315,10 @@ RLAPI void DrawEllipse(int centerX, int centerY, float radiusH, float radiusV, C
 RLAPI void DrawEllipseV(Vector2 center, float radiusH, float radiusV, Color color);                      // Draw ellipse (Vector version)
 RLAPI void DrawEllipseLines(int centerX, int centerY, float radiusH, float radiusV, Color color);        // Draw ellipse outline
 RLAPI void DrawEllipseLinesV(Vector2 center, float radiusH, float radiusV, Color color);                 // Draw ellipse outline (Vector version)
+RLAPI void DrawEllipseLinesEx(Vector2 center, float radiusH, float radiusV, float thick, Color color);   // Draw ellipse outline with line thickness
 RLAPI void DrawRing(Vector2 center, float innerRadius, float outerRadius, float startAngle, float endAngle, int segments, Color color); // Draw ring
 RLAPI void DrawRingLines(Vector2 center, float innerRadius, float outerRadius, float startAngle, float endAngle, int segments, Color color); // Draw ring outline
+RLAPI void DrawRingLinesEx(Vector2 center, float innerRadius, float outerRadius, float startAngle, float endAngle, int segments, float thick, Color color); // Draw ring outline with line thickness
 
 // Splines drawing functions
 RLAPI void DrawSplineLinear(const Vector2 *points, int pointCount, float thick, Color color);            // Draw spline: Linear, minimum 2 points