test: automated UI tests

[harshtandiya]

Overview

Set up automated end-to-end UI tests for critical user flows to prevent regressions as Forms Pro matures toward V1.

Suggested Stack

• Playwright (aligns with Frappe ecosystem tooling)

Flows to Cover (Initial)

• Create a new form, add fields, publish
• Fill and submit a public form
• View submission in dashboard
• Invite a team member
• Multistep form navigation (once implemented)

Goals

• Run in CI on every PR
• Block merge on failure for covered flows