Add prepare action and update lint workflow

.github/actions/prepare/action.yml

@@ -0,0 +1,14 @@
+description: Prepares the repo for a typical CI job
+
+name: Prepare
+
+runs:
+  steps:
+    - uses: pnpm/action-setup@v2
+    - uses: actions/setup-node@v3
+      with:
+        cache: pnpm
+        node-version: '18'
+    - run: pnpm install --frozen-lockfile
+      shell: bash
+  using: composite

.github/workflows/lint.yml

@@ -1,42 +1,13 @@
 name: Lint
 on:
+  pull_request: ~
   push:
     branches:
       - main
-  pull_request:
-    branches:
-      - main
 jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout
-        uses: actions/checkout@v3
-
-      - name: Install Node.js
-        uses: actions/setup-node@v3
-        with:
-          node-version: 18
-
-      - uses: pnpm/action-setup@v2
-        name: Install pnpm
-        with:
-          version: 8
-          run_install: false
-
-      - name: Get pnpm store directory
-        shell: bash
-        run: |
-          echo "STORE_PATH=$(pnpm store path --silent)" >> $GITHUB_ENV
-
-      - uses: actions/cache@v3
-        name: Setup pnpm cache
-        with:
-          path: ${{ env.STORE_PATH }}
-          key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
-          restore-keys: |
-            ${{ runner.os }}-pnpm-store-
-
-      - name: Install dependencies
-        run: pnpm install
+      - uses: actions/checkout@v3
+      - uses: ./.github/actions/prepare
       - run: pnpm lint