build on platforms

[ringabout]

No description provided.

[Copilot]

Pull request overview

Adds a GitHub Actions CI workflow to build the project across the three main GitHub-hosted runners (Linux, Windows, macOS), aligning with the goal of “build on platforms”.

Changes:

• Introduces a new CI workflow triggered on push and pull_request.
• Runs a matrix build on ubuntu-latest, windows-latest, and macos-latest.
• Sets up Nim, installs Linux-specific dependencies, and runs a Nimble command.

Comments suppressed due to low confidence (2)

.github/workflows/ci.yml:22

• CI installs Nim devel, which makes builds non-deterministic and can introduce sudden breakages unrelated to this repo. Consider pinning to a stable Nim version (or testing both stable + devel via a version matrix) so CI results are reproducible.

        uses: alaviss/setup-nim@0.1.1
        with:
          version: devel
          path: 'nim'

.github/workflows/ci.yml:16

• actions/checkout@v6 is not a valid released version and will cause the workflow to fail to resolve the action. Pin to an existing major (e.g., actions/checkout@v4) or to a specific commit SHA for supply-chain safety.

      - name: Checkout
        uses: actions/checkout@v6

---

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[ringabout]

Error:  Nim Output /home/runner/work/nimedit/nimedit/app/styles.nim(77, 3) Error: undeclared identifier: 'quitRequest'
        ... candidates (edit distance, scope distance); see '--spellSuggest': 
        ...  (5, 4): 'QuitEvent'
       Tip: 57 messages have been suppressed, use --verbose to show them.
vnext.nim(1128)          buildFromDir

[Araq]

Has been renamed to shutdown