Reorganize all observatory core projects into monorepo (#25)

* chore: move all observatory repos to core

* only save journal folder on change, don't constantly re-check during monitoring

* chore: monorepo project changes

* chore: monorepo migration

ObservatoryFramework/Files/Journal/Startup/FileHeader.cs

@@ -0,0 +1,20 @@
+using System.Text.Json.Serialization;
+
+namespace Observatory.Framework.Files.Journal
+{
+    public class FileHeader : JournalBase
+    {
+        [JsonPropertyName("part")]
+        public int Part { get; init; }
+
+        [JsonPropertyName("language")]
+        public string Language { get; init; }
+
+        [JsonPropertyName("gameversion")]
+        public string GameVersion { get; init; }
+
+        [JsonPropertyName("build")]
+        public string Build { get; init; }
+        public bool Odyssey { get; init; }
+    }
+}