docs: split Lambda Hooks into Common / Selenium-only / Playwright-only sections

[SahilSawLT]

Why

The Lambda Hooks page (https://www.testmuai.com/support/docs/lambda-hooks/) lists every hook in one flat table, with all examples in Selenium JavascriptExecutor syntax and no indication of which frameworks support which hook. Playwright users can't tell which hooks apply to them or how to invoke them (the Playwright syntax — page.evaluate with a lambdatest_action payload — is completely different), and several Playwright-only hooks weren't documented at all.

What changed

Reorganized the page into three sections. The classification comes from tracing the hub proxy's actual hook dispatch code for each engine (the Selenium JavascriptExecutor hook list + handlers, and the CDP lambdatest_action dispatch), not just constant definitions:

• Common (Selenium & Playwright) — a capability matrix showing the per-framework hook names and syntax side by side: set test status (lambda-status / setTestStatus), test-case grouping (lambda-testCase-start/end — string form in Selenium, action form in Playwright), lambdaUpdateName, lambda-unbound-ping
• Selenium-only — the remaining 19 existing hooks (file checks, files-delete, name/build, action, keyboard events, breakpoint, screenshot, throttle, ping, exceptions, clipboard, lambda:network, test-tags); these are not dispatched on the Playwright/CDP path
• Playwright-only — getTestDetails, lambdaSetBrowserPosition, lighthouseReport (with a note that Selenium gets Lighthouse automatically via the performance capability) — previously undocumented here

Also:

• New "How Lambda Hooks are invoked" section showing both syntaxes (the Playwright example matches the one already used in docs/playwright-testing.md)
• Fixed hook-name typos: underscore display names (lambda_breakpoint, …) → the actual hyphenated hook strings; lambda-network-throttle → lambda-throttle-network (the string the grid actually matches)
• Title/description generalized from "for Selenium Automation" to "for Automation Testing" (id/slug/canonical unchanged)

Existing table rows/examples were preserved verbatim wherever they only moved sections. The test-case grouping and setTestStatus Playwright examples are verified end-to-end (dashboard annotations render from them).

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