Add CI for JS parts (#260)

* CI for JS parts

* Add vitest

Author: kylebarron

.github/workflows/test-js.yml

@@ -0,0 +1,48 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - 'main'
+  pull_request:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+
+jobs:
+  lint-and-test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Set up Volta
+        uses: volta-cli/action@v4
+
+      - name: Get npm cache directory
+        id: npm-cache-dir
+        shell: bash
+        run: echo "dir=$(npm config get cache)" >> ${GITHUB_OUTPUT}
+
+      - uses: actions/cache@v3
+        id: npm-cache # use this to check for `cache-hit` ==> if: steps.npm-cache.outputs.cache-hit != 'true'
+        with:
+          path: ${{ steps.npm-cache-dir.outputs.dir }}
+          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-
+
+      - name: Install
+        run: npm install
+
+      - name: Prettier check
+        run: npm run fmt:check
+
+      - name: Type check
+        run: npm run typecheck
+
+      - name: Test
+        run: npm run test

.prettierrc.json

@@ -0,0 +1,5 @@
+{
+  "tabWidth": 2,
+  "semi": true,
+  "trailingComma": "all"
+}