chore(CI): added ci workflow to build docsite

.github/workflows/build-docsite.yml

@@ -0,0 +1,33 @@
+name: build docsite
+
+on:
+  push:
+    branches:
+      - master
+      - test-docsite
+    paths:
+      - 'docsite/**'
+  pull_request:
+    branches:
+      - master
+      - test-docsite
+    paths:
+      - 'docsite/**'
+
+jobs:
+  build:
+    name: build docsite
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 18
+          cache: yarn
+          cache-dependency-path: './docsite/yarn.lock'
+      - name: Install dependencies
+        run: cd docsite && yarn install --frozen-lockfile
+      - name: Build website
+        run: cd docsite && yarn build