ci: add workflow to check join data on schedule

.github/workflows/check.yml

@@ -0,0 +1,37 @@
+name: Check CH5 Joins
+
+on:
+  schedule:
+    - cron: "0 0 * * *"
+
+  workflow_dispatch:
+
+jobs:
+  check:
+    name: Check the current joins with the latest joins
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          persist-credentials: false
+
+      - name: Setup PNPM
+        uses: pnpm/action-setup@v3
+        with:
+          version: 8
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: .nvmrc
+          cache: pnpm
+
+      - name: Install Dependencies
+        run: pnpm install
+
+      - name: Run Check
+        run: pnpm vitest tests/check.test.ts