chore: add copybara gha

.github/workflows/copybara.yml

@@ -0,0 +1,49 @@
+name: Update pnpm lockfile
+
+on:
+  push:
+    branches:
+      - copybara-sbv2-solana-push
+
+jobs:
+  update-lockfile:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v3
+
+      - name: Use Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: 18
+
+      - name: Install pnpm
+        uses: pnpm/action-setup@v2
+        with:
+          version: 8.6.0
+
+      - name: Get pnpm store directory
+        id: pnpm-cache
+        shell: bash
+        run: |
+          echo "STORE_PATH=$(pnpm store path)" >> $GITHUB_OUTPUT
+
+      - uses: actions/cache@v3
+        name: Setup pnpm cache
+        with:
+          path: ${{ steps.pnpm-cache.outputs.STORE_PATH }}
+          key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+          restore-keys: |
+            ${{ runner.os }}-pnpm-store-
+
+      - name: Update pnpm lockfile
+        run: pnpm install --no-frozen-lockfile
+
+      - name: Push changes
+        uses: stefanzweifel/git-auto-commit-action@v4
+        with:
+          commit_message: "chore: Update pnpm lockfile"
+          skip_dirty_check: false
+          file_pattern: "pnpm-lock.yaml"
+          branch: copybara-sbv2-solana-push