chore(ci): add CI workflow for tests and lint on PRs and main

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: jdevera

.github/workflows/ci.yml

@@ -0,0 +1,41 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Set up Go
+        uses: actions/setup-go@v6
+        with:
+          go-version-file: go.mod
+
+      - name: Build
+        run: go build ./cmd/...
+
+      - name: Test
+        run: go test ./...
+
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Set up Go
+        uses: actions/setup-go@v6
+        with:
+          go-version-file: go.mod
+
+      - name: Lint
+        uses: golangci/golangci-lint-action@v7
+        with:
+          version: v2.11