Add rtkMethod so .Method( call sites rename with the method decl, improve
type renames across extend/annotations, and clip self to the enclosing
method body.
- Len→Length includes self.Len(); Point→Vec2 hits extend + types
- self→this stays within one method (textual func bounds)
- smoke_lsp_rename_method + test-lsp wiring
dimgigov
00195e2d98