feat: add CI with gitea workflows

.gitea/workflows/ci.yml

@@ -0,0 +1,25 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Run tests
+        run: cargo test --all
+
+      - name: Build release
+        run: cargo build --release
+
+      - name: Run shell decoder tests
+        run: bash shell/test_decoder.sh