feat: expand reusable Playwright template step library

[jamil2018]

Summary

• expands the canonical reusable Playwright template-step catalog from 36 steps in 11 groups to 116 steps in 24 groups
• adds reusable coverage for forms, keyboard/pointer interaction, tabs/frames/dialogs, downloads, browser state, synchronization, diagnostics, richer assertions, and safe structured operations
• hardens locator resolution for negative-state assertions, preserves referenced template steps during filesystem sync, and enriches validation-authoring discovery metadata
• regenerates the package registry, create-appraisejs starter/base templates, and Graphify outputs
• documents the reusable-step contract and lifecycle guidance

Safety

Structured operations use explicit page/locator allowlists, bounded JSON input, stored-value references, and argument validation. They do not expose arbitrary evaluation.

Validation

• focused Vitest suites: 28 passed
• full unit suite: 911 passed
• packages/appraisejs: 117 tests and build passed
• packages/create-appraisejs: 65 tests and build passed
• production build passed
• Playwright E2E: 38 passed
• Fallow release and staged gates passed
• React Doctor release and staged gates passed
• generated-artifact, package-boundary, harness, documentation-link, formatting, lint, TypeScript, and diff checks passed

Plan

Implements codex/development plan/appraise-0.5/agent tooling/rich-reusable-playwright-template-step-library.md.