[kernel 715] add web bot auth docs

[archandatta]

Note

Introduces Web Bot Auth integration and expands extension management docs, with navigation updates and a new performance testing guide.

• New integrations/web-bot-auth guide with quick start, custom key usage, and verification steps
• New CLI docs page reference/cli/extensions and card in reference/cli.mdx; documents list, upload, download, delete, download-web-store, and build-web-bot-auth
• Enhances browsers/extensions with an enterprise policies section detailing required files (update.xml, .crx), detection/validation, and install flow via ExtensionInstallForcelist
• Adds nav entries in docs.json for integrations/web-bot-auth and CLI Extensions page
• Adds testing/profile-loading-performance.md guide for measuring profile size/startup impact and proposing origin filtering

^{Written by Cursor Bugbot for commit 636e91f. This will update automatically on new commits. Configure here.}

[rgarcia]

the --upload flag should require an explicit name argument, e.g. --upload web-bot-auth-test. then update the references below to be consistent: line 34 ("Uploads it to Kernel as..."), line 45 (--extension), line 60 (TypeScript name:), and line 79 (Python name:). this makes it clear we're using the test key variant.

[rgarcia]

looks good! nice docs. a few suggestions on the CLI flag design for --upload.

[cursor]

Unrelated testing documentation accidentally committed

Medium Severity

This file appears to be accidentally committed. It's unrelated to the PR's purpose of adding web bot auth documentation and is not referenced in docs.json navigation. The file contains internal paths (kernel/packages/synthetic-tests), Go implementation suggestions, and placeholder template sections with unfilled values like [Date] and [Based on results]. This looks like internal testing documentation that shouldn't be in the public docs repository.