fix: simplify Windows CI build to resolve SwiftShims error

- Remove complex custom Windows build step with manual MSVC setup
- Use unified build script approach for all platforms (Windows, macOS, Linux)
- Let SwiftyLab/setup-swift handle Swift 6.0 toolchain configuration automatically
- Resolves "missing required module 'SwiftShims'" error

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

Co-Authored-By: Claude <noreply@anthropic.com>

Author: miriamkw

.github/workflows/ci.yml

@@ -51,44 +51,12 @@ jobs:
           if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
           pip install pytest
 
-      - name: Run build script (Unix)
-        if: matrix.os != 'windows-latest'
+      - name: Run build script
+        shell: bash
         run: |
           chmod +x build.sh
           ./build.sh
 
-      - name: Build on Windows
-        if: matrix.os == 'windows-latest'
-        shell: cmd
-        run: |
-          call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvars64.bat"
-
-          set "SWIFT_ROOT=C:\Users\runneradmin\AppData\Local\Programs\Swift"
-          set "SDKROOT=%SWIFT_ROOT%\Platforms\6.0.3\Windows.platform\Developer\SDKs\Windows.sdk"
-
-          :: Adjusting to the platform-specific lib folder
-          set "RESOURCE_DIR=%SWIFT_ROOT%\Toolchains\6.0.3+Asserts\usr\lib\swift\windows"
-
-          echo Verifying Paths...
-          if not exist "%RESOURCE_DIR%\shims" (
-              echo "Shims not found in %RESOURCE_DIR%, trying parent..."
-              set "RESOURCE_DIR=%SWIFT_ROOT%\Toolchains\6.0.3+Asserts\usr\lib\swift"
-          )
-
-          dir "%RESOURCE_DIR%\shims"
-
-          echo Starting Build with Corrected Paths...
-          swift build -c release -v ^
-            -Xswiftc -resource-dir -Xswiftc "%RESOURCE_DIR%" ^
-            -Xswiftc -I -Xswiftc "%RESOURCE_DIR%\shims" ^
-            -Xswiftc -L -Xswiftc "%RESOURCE_DIR%" ^
-            -Xcc -fno-implicit-modules ^
-            -Xcc -fno-modules ^
-            -Xcc -D_CRT_USE_BUILTIN_OFF ^
-            -Xswiftc -Xfrontend -Xswiftc -disable-implicit-concurrency-module-import
-
-          if %ERRORLEVEL% NEQ 0 exit /b %ERRORLEVEL%
-
       - name: Verify library was built
         shell: bash
         run: |