feat: add FoundLab visual capture kit

[irelia0nerf]

Context

Adds an organizational Visual Capture Kit to standardize UI screenshot evidence across FoundLab production and preview deployments.

What changed

• Adds reusable workflow: .github/workflows/visual-capture.yml.
• Adds Playwright runner: visual-capture-kit/src/capture.ts.
• Adds TypeScript package config and typecheck setup.
• Adds operational README with consumer examples and manifest contract.
• Adds organization workflow template for production visual capture.
• Adds template metadata and icon.

Operational contract

Consumer repositories can call:

jobs:
  visual-capture:
    uses: FoundLab-PoweredByGoogleCloud/.github/.github/workflows/visual-capture.yml@main
    with:
      url: https://example.com
      routes: /,/login,/pricing
      artifact-name: production-visual-capture

The workflow uploads PNG screenshots and manifest.json as a GitHub Actions artifact.

Inputs supported

• url
• routes
• artifact-name
• wait-ms
• full-page
• ready-selector
• viewports-json
• fail-fast
• kit-ref

Risk controls

• Uses Chromium headless via Playwright.
• Captures desktop/mobile by default.
• Supports readiness selector for apps with skeleton/loading states.
• Emits structured JSON logs.
• Produces manifest with pass/fail summary.
• Supports ref pinning via kit-ref and workflow reference.

Follow-up after merge

1. Create a protected v1 tag from main.
2. Update production consumers to use @v1 or a commit SHA instead of @main.
3. Add app-specific ready-selector where needed.
4. Add authenticated capture support in v2 if required.