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/Converters/StarPosConverter.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace Observatory.Framework.Files.Converters
+{
+    /// <summary>
+    /// Converting the ordered array of coordinates from the journal to a named tuple for clarity.
+    /// </summary>
+    public class StarPosConverter : JsonConverter<(double x, double y, double z)>
+    {
+        public override (double x, double y, double z) Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            double[] values = (double[])JsonSerializer.Deserialize(ref reader, typeof(double[]));
+
+            return (x: values[0], y: values[1], z: values[2]);
+        }
+
+        public override void Write(Utf8JsonWriter writer, (double x, double y, double z) value, JsonSerializerOptions options)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}