[examples] write overrides example; tidy up overrides overrview comment; tidy up misc notes files

examples_todo.txt

@@ -0,0 +1,22 @@
+Example Programs:
+[x] Metadesk hello world
+[x] Metadesk parse checker
+[x] User error checking
+[x] Datadesk-like setup
+[ ] Example type metadata
+    [x] Cleanup & Simplification Pass
+    [ ] Commentary
+    [ ] Example Type File With Errors
+[ ] Example of simple expression parser
+[ ] Example of C-like expression parser (with value and type expressions)
+[ ] Example(s) of using overrides
+    [x] Write
+    [ ] Commentary
+[ ] Example memory clearing in long-running program
+[ ] Example multi-threaded parsing
+
+Example Metadesk Files:
+[x] Hello world
+[x] identifiers, numbers, strings, and symbols
+[x] sets, seperators, and tags
+