chore: move TAPI implementation notes from wiki/ to notes/ (#1155)

- Remove TAPI-related files from wiki/ directory
- Add notes/ to .gitignore
- wiki/ should only contain user-facing documentation
- notes/ is for internal implementation documentation

Author: abueide

.gitignore

@@ -97,3 +97,5 @@ packages/core/src/info.ts
 
 AGENTS.md
 
+# Notes and research (not for commit)
+notes/