fix: add disk cleanup step to prevent out of space errors

Multi-platform Docker builds (amd64 + arm64) consume significant disk
space on GitHub Actions runners, often causing 'No space left on device'
errors.

This adds cleanup steps that remove unnecessary toolchains before
building:
- .NET SDK (~1-2 GB)
- Android SDK (~10+ GB)
- GHC (Haskell) (~1 GB)
- CodeQL tools (~5 GB)
- Unused Docker images

This typically frees up 20-30 GB of space, which should be sufficient
for multi-platform builds.

.github/workflows/build-and-release.yml

@@ -64,6 +64,15 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Free up disk space
+        run: |
+          sudo rm -rf /usr/share/dotnet
+          sudo rm -rf /usr/local/lib/android
+          sudo rm -rf /opt/ghc
+          sudo rm -rf /opt/hostedtoolcache/CodeQL
+          sudo docker image prune --all --force
+          df -h
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -141,6 +150,15 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Free up disk space
+        run: |
+          sudo rm -rf /usr/share/dotnet
+          sudo rm -rf /usr/local/lib/android
+          sudo rm -rf /opt/ghc
+          sudo rm -rf /opt/hostedtoolcache/CodeQL
+          sudo docker image prune --all --force
+          df -h
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3