refactor: CI & CD (#636)

* Update package manager to pnpm

* Update pnpm version to "latest" in build and release workflows

.github/workflows/build_test.yml

@@ -0,0 +1,37 @@
+name: Build test
+
+on:
+  push:
+
+jobs:
+  build-and-publish:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "lts/*"
+
+      - uses: pnpm/action-setup@v2
+        name: Install pnpm
+        with:
+          version: "latest"
+
+      - name: Install dependencies
+        run: pnpm i
+
+      - name: Install dependencies for SSG
+        working-directory: ssg/
+        run: pnpm i
+
+      - name: Build SPA
+        working-directory: .
+        run: pnpm run build
+
+      - name: Build SSG
+        working-directory: ssg/
+        run: pnpm run build

.github/workflows/release.yml

@@ -18,20 +18,25 @@ jobs:
         with:
           node-version: "lts/*"
 
+      - uses: pnpm/action-setup@v2
+        name: Install pnpm
+        with:
+          version: "latest"
+
       - name: Install dependencies
-        run: npm i
+        run: pnpm i
 
       - name: Install dependencies for SSG
         working-directory: ssg/
-        run: npm i
+        run: pnpm i
 
       - name: Build SPA
         working-directory: .
-        run: npm run build
+        run: pnpm run build
 
       - name: Build SSG
         working-directory: ssg/
-        run: npm run build
+        run: pnpm run build
 
       - name: Create release directory
         run: mkdir release