ci : add copilot-instructions.md (#15286)

* Initial plan

* Initialize copilot instructions exploration

* Add comprehensive .github/copilot-instructions.md file

* Update Python environment and tools directory documentation

- Add instructions for using .venv Python environment
- Include flake8 and pyright linting tools from virtual environment
- Add tools/ as core directory in project layout
- Reference existing configuration files (.flake8, pyrightconfig.json)

* add more python dependencies to .venv

* Update copilot instructions: add backend hardware note and server testing

* Apply suggestions from code review

* Apply suggestions from code review

* Replace clang-format with git clang-format to format only changed code

* Minor formatting improvements: remove extra blank line and add trailing newline

* try installing git-clang-format

* try just clang-format

* Remove --binary flag from git clang-format and add git-clang-format installation to CI

* download 18.x release

* typo--

* remove --binary flag

---------

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>

.github/workflows/copilot-setup-steps.yml

@@ -39,6 +39,10 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install build-essential libcurl4-openssl-dev
+          # Install git-clang-format script for formatting only changed code
+          wget -O /tmp/git-clang-format https://raw.githubusercontent.com/llvm/llvm-project/release/18.x/clang/tools/clang-format/git-clang-format
+          sudo cp /tmp/git-clang-format /usr/local/bin/git-clang-format
+          sudo chmod +x /usr/local/bin/git-clang-format
 
       - name: Set up Python
         uses: actions/setup-python@v5
@@ -50,4 +54,4 @@ jobs:
           python3 -m venv .venv
           .venv/bin/activate
           pip install -r requirements/requirements-all.txt -r tools/server/tests/requirements.txt
-          pip install flake8 pyright
+          pip install flake8 pyright pre-commit