[CUSTOM TOOLS] Roslyn Runtime Compilation Feature (#371)

* Update .Bat file and Bug fix on ManageScript

* Update the .Bat file to include runtime folder
* Fix the inconsistent EditorPrefs variable so the GUI change on Script Validation could cause real change.

* Further changes

String to Int for consistency

* [Custom Tool] Roslyn Runtime Compilation

Allows users to generate/compile codes during Playmode

* Fix based on CR

Author: Scriptwonder

CustomTools/RoslynRuntimeCompilation/ManageRuntimeCompilation.cs

@@ -0,0 +1,3 @@
+# Roslyn Runtime Compilation Tool
+
+This custom tool uses Roslyn Runtime Compilation to have users run script generation and compilation during Playmode in realtime, where in traditional Unity workflow it would take seconds to reload assets and reset script states for each script change.