fix(ci): build storybook via vp before running chromatic

Chromatic action spawns pnpm directly which isn't on PATH with
setup-vp. Build storybook separately and pass storybookBuildDir.

Author: fengmk2

.github/workflows/chromatic.yml

@@ -31,10 +31,13 @@ jobs:
           node-version: lts/*
           cache: true
 
+      - name: 🏗️ Build Storybook
+        run: vp run build-storybook
+
       - name: 🧪 Run Chromatic Visual and Accessibility Tests
         uses: chromaui/action@0794e6939fe40ce46a88963f818092afc427da5b # v15.3.0
         with:
-          buildScriptName: vp run build-storybook
+          storybookBuildDir: storybook-static
         env:
           CHROMATIC_BRANCH: ${{ github.event.pull_request.head.ref || github.ref_name }}
           CHROMATIC_SHA: ${{ github.event.pull_request.head.sha || github.sha }}