Add Gitea smoke runner workflow

.gitea/workflows/smoke.yml

@@ -0,0 +1,48 @@
+name: smoke
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  smoke:
+    runs-on:
+      - debian-13
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Verify runner prerequisites
+        run: |
+          set -euo pipefail
+          command -v bash >/dev/null
+          command -v curl >/dev/null
+          command -v gcc >/dev/null
+          command -v pkg-config >/dev/null
+          pkg-config --exists libnftables
+
+      - name: Install .NET SDK
+        run: |
+          set -euo pipefail
+          curl -fsSL https://dot.net/v1/dotnet-install.sh -o dotnet-install.sh
+          bash dotnet-install.sh --channel 10.0 --quality ga --install-dir "$HOME/.dotnet"
+
+      - name: Show .NET info
+        run: |
+          set -euo pipefail
+          "$HOME/.dotnet/dotnet" --info
+
+      - name: Restore
+        run: |
+          set -euo pipefail
+          "$HOME/.dotnet/dotnet" restore
+
+      - name: Build
+        run: |
+          set -euo pipefail
+          "$HOME/.dotnet/dotnet" build --no-restore
+
+      - name: Test
+        run: |
+          set -euo pipefail
+          "$HOME/.dotnet/dotnet" test LibNftables.slnx --no-build

README.md

@@ -63,6 +63,30 @@ The test suite contains:
 - Native integration tests that self-gate when `libnftables` is unavailable
 - Capability-dependent tests that only run when `CAP_NET_ADMIN` is available
 
+## Gitea Smoke CI
+
+The repository includes a Gitea Actions smoke workflow at `.gitea/workflows/smoke.yml`.
+
+- Trigger: push and pull request
+- Runner label: `debian-13`
+- Job model: non-root smoke verification
+- Workflow actions:
+  - bootstrap the .NET 10 SDK inside the job
+  - restore
+  - build
+  - run `dotnet test`
+
+Important runner prerequisites:
+
+- Debian 13 host with the `debian-13` label
+- `bash`
+- `curl`
+- `gcc`
+- `pkg-config`
+- system-installed `libnftables` development/runtime packages discoverable by `pkg-config`
+
+The job does not attempt package-manager installs or privilege escalation. It is intended to catch restore/build/test regressions, not to provide privileged nftables coverage.
+
 ## High-Level Example
 
 ```csharp