Migrate repo to use GitHub Actions (#992)

## Description

We are working on consolidating all CI to GitHub Actions.

## Documentation

Does this require changes to the WorkOS Docs? E.g. the [API
Reference](https://workos.com/docs/reference) or code snippets need
updates.

```
[ ] Yes
```

If yes, link a related docs PR and add a docs maintainer as a reviewer.
Their approval is required.

.github/workflows/ci.yml

@@ -0,0 +1,45 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - 'main'
+  pull_request: {}
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  test:
+    name: Test Node ${{ matrix.node }}
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node: [14, 16, 18, 20]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node }}
+
+      - name: Install Dependencies
+        run: |
+          npm install
+
+      - name: Prettier
+        run: |
+          npm run prettier
+
+      - name: Lint
+        run: |
+          npm run lint
+
+      - name: Build
+        run: |
+          npm run build
+
+      - name: Test
+        run: |
+          npm run test
+