Standardize CI workflows

- Update swift-format to Swift 6.2
- Standardize swiftlint to simple variant
- Remove Windows CI jobs (too flaky)
- Add README validation where missing
- Add missing workflow files

All swift-* packages now have consistent CI configuration:
- Test on minimum Swift version (macOS)
- Test on Swift 6.2 (macOS & Ubuntu)
- README validation tests
- No Windows support

Author: coenttb

.github/workflows/ci.yml

@@ -76,19 +76,6 @@ jobs:
       - name: Run tests
         run: swift test
 
-  windows:
-    name: Windows (Swift 6.2)
-    runs-on: windows-latest
-    steps:
-      - uses: actions/checkout@v5
-      - uses: SwiftyLab/setup-swift@latest
-        with:
-          swift-version: "6.2"
-      - name: Build
-        run: swift build
-      - name: Run tests
-        run: swift test
-
   readme-validation:
     name: README Code Examples
     runs-on: macos-26

.github/workflows/swift-format.yml

@@ -13,7 +13,7 @@ jobs:
   swift_format:
     name: swift-format
     runs-on: ubuntu-latest
-    container: swift:6.0
+    container: swift:6.2
     permissions:
       contents: write
     steps: