chore: add ci caching

Author: saleel

.github/workflows/e2e.yml

@@ -18,7 +18,17 @@ jobs:
     - name: Set up Docker
       uses: docker/setup-buildx-action@v2
 
+    - name: Cache Aztec CLI
+      uses: actions/cache@v3
+      id: aztec-cache
+      with:
+        path: ~/.aztec
+        key: ${{ runner.os }}-aztec-${{ hashFiles('**/yarn.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-aztec-
+
     - name: Install Aztec CLI
+      if: steps.aztec-cache.outputs.cache-hit != 'true'
       run: |
         curl -s https://install.aztec.network > tmp.sh
         bash tmp.sh <<< yes "yes"
@@ -39,7 +49,17 @@ jobs:
       working-directory: ./app
       run: npm install -g yarn && yarn
 
+    - name: Cache Playwright browsers
+      uses: actions/cache@v3
+      id: playwright-cache
+      with:
+        path: ~/.cache/ms-playwright
+        key: ${{ runner.os }}-playwright-${{ hashFiles('**/yarn.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-playwright-
+
     - name: Install Playwright Browsers
+      if: steps.playwright-cache.outputs.cache-hit != 'true'
       working-directory: ./app
       run: yarn playwright install --with-deps