Swap to gitea actions (#13)

Reviewed-on: #13

.gitea/workflows/test.yaml

@@ -0,0 +1,33 @@
+name: Ruby CI
+
+on:
+  pull_request:
+
+jobs:
+  test:
+    runs-on: cth-ubuntu-latest
+    steps:
+    - uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.3.1
+    - uses: actions/checkout@v4
+    - uses: actions/cache@v4
+      with:
+        path: vendor/bundle
+        key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gems-
+    - name: Install dependencies
+      run: |
+        bundle config path vendor/bundle
+        bundle install --jobs 4 --retry 3
+    - name: autoload
+      run: bin/rails zeitwerk:check
+    - name: lint
+      run: bin/rubocop
+    - name: security
+      run: bin/brakeman
+    - name: test
+      run: |
+        bin/rails assets:precompile
+        bin/rails test