Emit typed Playwright modules for Sightkick tools and views

[chiplay]

Summary

Compile Sightkick tools into a typed Playwright module:

sightkick build examples/search --target playwright -o app.mjs

This emits app.mjs and NodeNext-compatible app.d.mts. createSightkick(page) exposes typed tool calls and view waits against a caller-owned Playwright Page. The executor reuses existing query and extraction semantics and performs trusted input, preserving guards, optional steps, structured returns, and guidance. Default JSON IR and stored-plan hashes remain unchanged.

docs/playwright.md documents usage, execution behavior, and supported APIs. Includes a minor changeset and CI checks for the embedded executor.

Validation

• 7 Chromium/NodeNext tests passed, covering the search SPA, combobox input, scoped/accessible/shadow queries, guards, timeouts, navigation, generated types, and adversarial property names.
• 47 existing runtime tests, TypeScript checks, Go tests, and go vet -tags e2e ./... passed.
• Existing runtime bundle and golden JSON IR remain unchanged.