feat: add NuGet and Godot distribution

.gitea/workflows/publish-nuget.yml

@@ -0,0 +1,52 @@
+name: Publish NuGet packages
+
+on:
+  push:
+    tags:
+      - 'v*'
+  workflow_dispatch:
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    env:
+      NUGET_AUTH_TOKEN: ${{ secrets.SHRINKSDK_PACKAGE_TOKEN }}
+    steps:
+      - name: Checkout tagged source
+        uses: actions/checkout@v4
+
+      - name: Set up .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: '8.0.x'
+
+      - name: Validate tag and pack projects
+        env:
+          GITEA_REF: ${{ gitea.ref }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          tag="${GITEA_REF#refs/tags/}"
+          version="$(node -p "require('./package.json').version")"
+          test "$tag" = "v$version"
+          mkdir -p packages
+          mapfile -d '' projects < <(find DotNet~ Godot~ -type f -name '*.csproj' -print0 2>/dev/null || true)
+          test "${#projects[@]}" -gt 0
+          for project in "${projects[@]}"; do
+            dotnet restore "$project" --configfile NuGet.Config
+            dotnet pack "$project" --configuration Release --no-restore --output "$PWD/packages" --include-symbols --include-source
+          done
+          find packages -maxdepth 1 -name '*.nupkg' -type f | grep -q .
+
+      - name: Publish packages
+        shell: bash
+        run: |
+          set -euo pipefail
+          : "${NUGET_AUTH_TOKEN:?SHRINKSDK_PACKAGE_TOKEN is required}"
+          dotnet nuget push 'packages/*.nupkg' --api-key "$NUGET_AUTH_TOKEN" --source https://git.crash.work/api/packages/ShrinkSDK/nuget/index.json --skip-duplicate
+          if compgen -G 'packages/*.snupkg' > /dev/null; then
+            dotnet nuget push 'packages/*.snupkg' --api-key "$NUGET_AUTH_TOKEN" --source https://git.crash.work/api/packages/ShrinkSDK/nuget/index.json --skip-duplicate
+          fi