Simplify CI/publish workflows to mirror psake (#450)

## Summary
- Replace `PesterReports.yml` with a minimal `CI.yml` that delegates
dependency install to `build.ps1 -Bootstrap`, dropping the `PSDepend` +
`psmodulecache` dance and the deprecated `::set-output` syntax
- Simplify `publish.yaml` to rely on `-Bootstrap` instead of the
drift-prone hardcoded module list in `JustinGrote/ModuleFast-action`
- Kept publish as `workflow_dispatch`-only so releases remain deliberate

Both workflows now mirror [psake's
approach](https://github.com/psake/psake/tree/main/.github/workflows):
let `build.ps1` + `requirements.psd1` be the single source of truth for
dependencies.

## Test plan
- [ ] CI workflow runs green on Ubuntu, Windows, macOS for this PR
- [ ] Test-result check appears on the PR via
`EnricoMi/publish-unit-test-result-action`
- [ ] Manually dispatch `Publish Module` from a throwaway branch (or
after merge) to confirm it still pushes to PSGallery

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: HeyItsGilbert

.github/workflows/CI.yml

@@ -0,0 +1,55 @@
+name: CI
+permissions:
+  checks: write
+  pull-requests: write
+  contents: read
+on:
+  push:
+    branches: [master]
+    paths:
+      - 'Plaster/**'
+      - 'Tests/**'
+      - 'build.ps1'
+      - 'psakeFile.ps1'
+      - 'requirements.psd1'
+  pull_request:
+    paths:
+      - 'Plaster/**'
+      - 'Tests/**'
+      - 'build.ps1'
+      - 'psakeFile.ps1'
+      - 'requirements.psd1'
+  workflow_dispatch:
+
+jobs:
+  test:
+    name: Test (${{ matrix.os }})
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Test
+        shell: pwsh
+        run: ./build.ps1 -Task Test -Bootstrap
+      - name: Upload Test Results
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: testResults-${{ matrix.os }}
+          path: ./tests/out/testResults.xml
+
+  publish-test-results:
+    name: Publish Test Results
+    needs: test
+    runs-on: ubuntu-latest
+    if: ${{ !cancelled() }}
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          path: artifacts
+      - uses: EnricoMi/publish-unit-test-result-action@v2
+        with:
+          files: artifacts/**/*.xml

.github/workflows/PesterReports.yml

@@ -1,24 +1,18 @@
 name: Publish Module
+permissions:
+  contents: read
 on:
-  # Only on workflow dispatch, so that we can control when to publish.
+  # Manual-dispatch only, so releases are deliberate.
   workflow_dispatch:
+
 jobs:
-  build:
-    runs-on: windows-latest
+  publish:
+    name: Publish to PSGallery
+    runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - name: ⚡ ModuleFast with Specification
-        uses: JustinGrote/ModuleFast-action@v0.0.1
-        with:
-          specification: |
-            BuildHelpers
-            PowerShellBuild
-            psake
-            PSScriptAnalyzer
-            platyPS
-      - name: Build and publish
+      - uses: actions/checkout@v4
+      - name: Build and Publish
+        shell: pwsh
         env:
           PSGALLERY_API_KEY: ${{ secrets.GALLERY_KEY }}
-        shell: pwsh
-        run: |
-          ./build.ps1 -Task Publish -Bootstrap
+        run: ./build.ps1 -Task Publish -Bootstrap