Clangd: Add clangd parameters in IDE agnostic config file

[WillyJL]

What's new

• Clangd now works in other IDE's without IDE specific configuration, eg Zed editor
• With this patch getting language support (in Zed) is as easy as:
  • For FBT:
    • Clone repo
    • Build fully once (./fbt updater_package)
    • Restart Clangd extension in IDE
  • For uFBT:
    • Clone/create app
    • ufbt vscode_dist (only needed once)
    • Restart Clangd extension in IDE
    • To build: ufbt cdb build (always include cdb before each build/launch command, it will update the compile_commands.json used by Clangd)

Verification

• Compile firmare, open other editor with clangd support (eg Zed), open a C file, clangd goes through indexing and diagnostics work as expected

Checklist (For Reviewer)

• PR has description of feature/bug or link to Confluence/Jira task
• Description contains actions to verify feature/bugfix
• I've built this code, uploaded it to the device and verified feature/bugfix