chore: simplify and clean up CI workflows (#617)

- Remove redundant Gradle flags, env vars, and unused settings across
all workflows
- Minimize GitHub Actions permissions to least-privilege
- Drop Windows build matrix (JVM tests covered by Linux)
- Simplify CodeQL workflow (remove matrix, unused permissions, stale
triggers)
- Clean up gradle.properties (remove unused KMP settings)

## How Has This Been Tested?
<!-- Have you tested this in a real application? Which scenarios were
tested? -->

## Breaking Changes
—

## Types of changes
- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

.github/workflows/apidocs.yaml

@@ -25,9 +25,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-        with:
-          submodules: true  # Fetch Hugo themes (true OR recursive)
-          fetch-depth: 0    # Fetch all history for .GitInfo and .Lastmod
 
       - name: Set up JDK ${{ env.JAVA_VERSION }}
         uses: actions/setup-java@v5
@@ -41,7 +38,7 @@ jobs:
 
       - name: Generate Dokka Site
         run: |-
-          ./gradlew clean knit docs:classes docs:knitCheck dokkaGenerate
+          ./gradlew knit docs:classes docs:knitCheck dokkaGenerate
 
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v4