DRY the github workflows by making composite setup action

.github/actions/setup/action.yml

@@ -0,0 +1,19 @@
+name: Setup environment
+description: 'Set up the repository to run yarn commands on it etc...'
+
+runs:
+  using: 'composite'
+
+  steps:
+    - name: Setup Node
+      uses: actions/setup-node@v4
+      with:
+        node-version: 22
+
+    - name: Enable corepack for yarn berry
+      shell: bash
+      run: corepack enable
+
+    - name: Install NPM packages
+      shell: bash
+      run: yarn install --frozen-lockfile

.github/workflows/build.yml

@@ -8,19 +8,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Setup Node
-        uses: actions/setup-node@v4
-        with:
-          node-version: 22
-
-      - name: Enable corepack for yarn berry
-        run: corepack enable
-
-      - name: Install NPM packages
-        run: yarn install --frozen-lockfile
-
+      - name: 'Setup'
+        run: './.github/workflows/setup.yml'
       - name: Build the packages
         run: yarn lerna run build

.github/workflows/test.yml

@@ -11,13 +11,8 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Setup Node
-        uses: actions/setup-node@v4
-        with:
-          node-version: 22
-
-      - name: Install NPM packages
-        run: yarn install --frozen-lockfile
+      - name: setup
+        uses: './.github/actions/setup'
 
       - name: Run tests
-        run: yarn lerna run test
+        run: yarn workspaces foreach --all run test run