Adds windows swift support (#8622)

Adding support for windows requires the code generations
to add a compiler statement to completely ignore GRPC code
generation on windows

Cleanup the project to use the main Package.swift to run tests
instead of having it separate and includes the imports for GRPC
within it.

Adds windows swift ci

.github/workflows/build.yml

@@ -492,10 +492,10 @@ jobs:
        sh phpUnionVectorTest.sh
 
   build-swift:
-    name: Build Swift
+    name: Test Swift
     strategy:
       matrix:
-        swift: ["5.9", "5.10", "6.0"]
+        swift: ["5.9", "5.10", "6.1"]
     # Only 22.04 has swift at the moment https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2204-Readme.md?plain=1#L30
     runs-on: ubuntu-22.04
     steps:
@@ -506,13 +506,23 @@ jobs:
     - name: Get swift version
       run: swift --version
     - name: test
-      working-directory: tests/swift/tests
       run: |
         swift build --build-tests
         swift test
 
+  build-swift-windows:
+    name: Test swift windows
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: SwiftyLab/setup-swift@latest
+        with:
+          swift-version: '6.1'
+      - run: swift build
+      - run: swift test
+
   build-swift-wasm:
-    name: Build Swift Wasm
+    name: Test Swift Wasm
     runs-on: ubuntu-24.04
     container:
       image: ghcr.io/swiftwasm/carton:0.20.1