ci: add Gitea release workflow with AllgemeinerProblemLoeser.bin asset

Build on v* tag push or workflow_dispatch and attach output binary via
gitea-release-action.

.github/workflows/release.yml

@@ -0,0 +1,40 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  release:
+    name: Build and Release
+    runs-on: ubuntu-latest
+    container: devkitpro/devkita64:latest
+
+    steps:
+      - name: Install dependencies
+        run: apt-get update && apt-get install -y nodejs
+
+      - name: Checkout latest code
+        uses: actions/checkout@v5
+        with:
+          clean: true
+          submodules: recursive
+          fetch-depth: 0
+
+      - name: Build
+        run: |
+          export DEVKITPRO=/opt/devkitpro
+          make -j4 all
+        shell: bash
+
+      - name: Publish release
+        uses: https://gitea.com/actions/gitea-release-action@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          files: |-
+            output/AllgemeinerProblemLoeser.bin