chore: added CI

Author: sphaso

.github/workflows/ci.yml

@@ -0,0 +1,17 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - run: cargo test
+      - run: cargo clippy -- -D warnings
+      - run: cargo doc --no-deps

README.md

@@ -1,5 +1,7 @@
 # patchwork
 
+[![Build Status](https://github.com/sphaso/patchwork/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/sphaso/patchwork/actions/workflows/ci.yml)
+
 A Rust library for diffing and patching sequences and nested structures.
 
 ## Features