cool#9772: VSCodium/clangd: Add generation of .clangd and .vscode files to ease editing via IDE/language-server

[sgothel]

Change-Id: Ic53e554598302e0b5e67568c6b72b9be1bd890a4

• Resolves: #9772
• Target version: master

Summary

Initial integration of .clangd via make gen-clangd and vscode via make gen-vscode, for

• compile_commands.json
  • already supported via make compile_commands
  • fixed with earlier commit
• .clangd
  • in addition to compile_commands.json (CompileFlags), allowing setting include defaults, workspace-dir as well as other clangd settings: Index, Diagnostics (clang-tidy IDE setup), InlayHints (IDE), Hover (IDE).
• .vscode/settings.json
  • VSCodium workspace settings (actually empty)
• .vscode/online.code-workspace
  • VSCodium workspace project file (proposal)

New make targets:

• gen-clangd Produces .clangd and compile_commands.json files
• gen-vscode Produces .clangd and and compile_commands.json files and .vscode directory.
• clean-clangd removes .clangd file.
• clean-vscode removes .clangd file and .vscode directory.

Note: The clang* setup has been tested with

• VSCodium Version: 1.91.1, Release: 24193, Commit: 8512cb3341b26a5dba985a9a17eed8d7c3362886, Date: 2024-07-11T18:37:10.462Z
• Eclipse cdt-jsp: C/C++ LSP Support , 2.1.0.202408070815, org.eclipse.cdt.lsp.feature.feature.group, Eclipse CDT

TODO

Maybe we can refine

• Documentation (manuals or wiki) ?

Checklist

• [X] I have run make prettier-write and formatted the code.
• [x] All commits have Change-Id
• [x] I have run tests with make check
• [x] I have issued make run and manually verified that everything looks okay
• [ ] Documentation (manuals or wiki) has been updated or is not required