Parse C# script namespace and class

- Added a very simple parser that can extract the namespace and class name of a C# script.

modules/mono/csharp_script.h

@@ -275,6 +275,8 @@ class CSharpLanguage : public ScriptLanguage {
 
 	int lang_idx;
 
+	Dictionary scripts_metadata;
+
 public:
 	StringNameCache string_names;
 
@@ -295,6 +297,10 @@ public:
 	void reload_assemblies_if_needed(bool p_soft_reload);
 #endif
 
+	void project_assembly_loaded();
+
+	_FORCE_INLINE_ const Dictionary &get_scripts_metadata() { return scripts_metadata; }
+
 	virtual String get_name() const;
 
 	/* LANGUAGE FUNCTIONS */