[VSC-1630 | 1527] Feature clang project configuration

[brianignacio5]

Description

Add ESP-IDF: Configure project for ESP-Clang command to configure the current workspace project for LLVM Clang extension language server, to allow the user to configure esp-idf project syntax highlighting, go to declaration, etc.

Fixes #1352
Fixes #1484

Type of change

• New feature (non-breaking change which adds functionality)

Steps to test this pull request

Provide a list of steps to test changes in this PR and required output

1. Click on ESP-IDF: Configure project for ESP-Clang command.
2. The idf.customExtraVars should have IDF_TOOLCHAIN and clang.path and clang.arguments should be added to project's .vscode/settings.json. Add .clangd file to project.
3. Review the user can install esp-clang toolchain with ESP-IDF: Configure ESP-IDF extension and the LLVM Clang extension provide C/C++ language support after running step 1.
4. Observe results.

• Expected behaviour:

User can use the esp-clang toolchain and the LLVM Clang extension to provide C/C++ language support (syntax highlight, code navigation, etc.)

• Expected output:

The clang.path and clang.arguments should be added to project's .vscode/settings.json

Test Configuration:

• ESP-IDF Version: 5.3.1
• OS (Windows,Linux and macOS): macOS

Checklist

• PR Self Reviewed
• Applied Code formatting
• Added Documentation
• Added Unit Test
• Verified on all platforms - Windows,Linux and macOS

[github-actions]

Download the artifacts for this pull request:
You can test these changes by installing this VSIX by click menu View -> Command Palette..., type Install from VSIX and then select downloaded esp-idf-extension.vsix file to install the extension.

• esp-idf-extension.vsix.zip
  Espressif documentation preview

[shiinakaze]

Thank you for your patch.

[radurentea]

LGTM

[Fabricio-ESP]

Confirmed working.
Re-adding IDF to the extension or installing a new version will add esp-clang tool to the toolset.