chore: enable corepack and set up Yarn 4 in CI configuration

Author: Coderrob

.github/workflows/ci.yml

@@ -22,6 +22,10 @@ jobs:
         with:
           node-version: ${{ matrix.node-version }}
           cache: "yarn"
+          corepack: enable
+
+      - name: Setup Yarn 4
+        run: corepack prepare yarn@4 --activate
 
       - name: Install dependencies
         run: yarn install --frozen-lockfile