Add GitHub Actions CI workflow using dotnet commands directly

[Copilot]

The repo had no CI workflow. The issue requests building via dotnet commands rather than invoking build.ps1.

Changes

• .github/workflows/build.yml — new CI workflow that:
  • Runs on windows-latest (required for net8.0-windows / WinForms target)
  • Triggers on push/PR to main
  • Builds using dotnet directly, skipping build.ps1:

    - run: dotnet restore VisualKeyBoard.sln
    - run: dotnet build VisualKeyBoard.sln -c Release --no-restore

  • Sets permissions: contents: read for least-privilege token scoping

[yangxiaobai945]

@copilot 合并这个 pr

[Copilot]

@copilot 合并这个 pr

合并 PR 需要仓库维护者手动操作，我无法直接执行合并。请在 GitHub 页面上点击 "Merge pull request" 按钮完成合并。

[Copilot]

Pull request overview

Adds a first GitHub Actions CI workflow to build the WinForms/.NET solution on Windows runners using dotnet CLI commands (instead of invoking build.ps1), providing basic PR/push validation on main.

Changes:

• Introduces a new Build workflow running on windows-latest.
• Restores and builds the solution in Release using dotnet restore + dotnet build --no-restore.
• Scopes GITHUB_TOKEN permissions to contents: read.

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[Copilot]

The workflow builds VisualKeyBoard.sln, but the repo’s documented/automated build path prefers VisualKeyBoard.slnx when present (see build.ps1 and README). This can cause CI to build a different solution than local builds and will break if the .sln is ever removed or becomes out of sync. Consider using the .slnx file (or adding a small step to select .slnx when it exists, falling back to .sln), matching build.ps1’s behavior.

Suggested change

	- name: Restore dependencies
	run: dotnet restore VisualKeyBoard.sln
	- name: Build
	run: dotnet build VisualKeyBoard.sln -c Release --no-restore
	- name: Select solution file
	id: select-solution
	shell: pwsh
	run: |
	if (Test-Path 'VisualKeyBoard.slnx') {
	"solution=VisualKeyBoard.slnx" >> $env:GITHUB_OUTPUT
	} else {
	"solution=VisualKeyBoard.sln" >> $env:GITHUB_OUTPUT
	}
	- name: Restore dependencies
	run: dotnet restore ${{ steps.select-solution.outputs.solution }}
	- name: Build
	run: dotnet build ${{ steps.select-solution.outputs.solution }} -c Release --no-restore