chore: added documentation step to ci

Author: yehorsobko-mac

.github/workflows/ci.yml

@@ -97,6 +97,18 @@ jobs:
             kill $SERVER_PID 2>/dev/null || true
           fi
 
+  documentation:
+    name: Documentation
+    runs-on: macos-latest
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@v4
+      - uses: swift-actions/setup-swift@v2
+        with:
+          swift-version: "6.1.0"
+      - name: Build Documentation
+        run: swift package generate-documentation --target MCP --warnings-as-errors
+
   static-linux-sdk-build:
     name: Linux Static SDK Build (${{ matrix.swift-version }} - ${{ matrix.os }})
     strategy: