Add PSC (.psc) indexing and share TclOO class metadata across files so class
definitions discovered via PSC layers can be used for completions, signature
help, inlay hints, and "go to definition". Key behavior changes:
- Client file watcher now includes *.psc and .vscode launch paths/tests updated
to use the postprocessor test folder; .gitignore updated to ignore that folder.
- Server watches .psc changes and refreshes a PSC script index; new
tools/tcloo_navigation.py exposes tcloo_definition used by the language server
to resolve cross-file class/constructor/method definitions.
- Language server uses class_snapshot(document.path) when producing TclOO
completions, signature help, and inlay hints so resolved class metadata is
available across files.
Also includes related docs/changelog updates, minor code formatting cleanups,
and added tests for PSC/TclOO behavior.
Christoph Brandau
757b885f28