* docs: add Node LTS pinning guide for macOS Homebrew users
New doc (docs/node-lts-macos.md) explains how to pin Node 24 LTS
via Homebrew to avoid running on odd-numbered development releases.
Covers brew install/link/pin, version managers as alternatives,
and verification steps.
Added notice banner in README linking to the guide.
* fix: improve LSP diagnostics when no servers detected (#1082)
When lsp status returns 'No language servers configured', the output
now includes diagnostics:
- Which project markers were detected (e.g. package.json found)
- Which server commands are missing (e.g. typescript-language-server)
- Install instructions
Also added LSP troubleshooting section to docs/troubleshooting.md
with common install commands per language.
