ci: adds a basic CI pipeline

Author: claymcleod

.github/workflows/ci.yml

@@ -0,0 +1,21 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - ecc/**
+  pull_request:
+    paths:
+      - ecc/**
+
+jobs:
+  ecc-check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Update Rust
+        run: rustup update stable && rustup default stable
+      - run: cargo install --path crates/ecc-cli
+      - run: ecc-cli ecc check