[GHAction] Upgrade node to 22 and add retry/cache

I saw a GH action fail with the vscode exec download. This adds a retry
as well as cache to help try and make CI more resilient.

Author: ttiimm

.github/workflows/main.yml

@@ -99,7 +99,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '20'
+          node-version: '22'
           cache: 'pnpm'
           cache-dependency-path: 'editors/code/pnpm-lock.yaml'
 
@@ -195,7 +195,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '20'
+          node-version: '22'
           cache: 'pnpm'
           cache-dependency-path: 'editors/code/pnpm-lock.yaml'
 
@@ -212,6 +212,12 @@ jobs:
           tar -xzf artifacts/log2src-${{ github.ref_name }}-macos-arm64/log2src-${{ github.ref_name }}-macos-arm64.tar.gz -C editors/code/bin/darwin-arm64
           unzip -o artifacts/log2src-${{ github.ref_name }}-windows-x64/log2src-${{ github.ref_name }}-windows-x64.zip -d editors/code/bin/win-x64
 
+      - name: Cache VS Code test runtime
+        uses: actions/cache@v4
+        with:
+          path: editors/code/.vscode-test
+          key: ${{ runner.os }}-vscode-test-${{ hashFiles('editors/code/pnpm-lock.yaml') }}
+
       - name: Install Dependencies
         working-directory: editors/code
         run: pnpm install
@@ -221,7 +227,13 @@ jobs:
         if: runner.os == 'Linux'
         run: |
           sudo apt-get install -y xvfb
-          pnpm run test:ci
+          for attempt in 1 2 3; do
+            pnpm run test:ci && exit 0
+            if [ "$attempt" -eq 3 ]; then
+              exit 1
+            fi
+            sleep $((attempt * 30))
+          done
 
       - name: Run Tests (Osx/Windows)
         working-directory: editors/code