Document in-page mentions in the web editor - #7048

Running Vale across on the following files affected by this PR:

- components/index.mdx
- editor/agent.mdx
- editor/collaborate.mdx
- editor/keyboard-shortcuts.mdx
- editor/pages.mdx
- components/mention.mdx

Attempting to initialize Vale linter...
Customer vale configuration detected. Attempting to sync packages...
Packages synced successfully.
Attempting to run Vale spellcheck...
Vale spellcheck completed successfully.

editor/agent.mdx:
	- 13:1     Avoid first-person pronouns such as ' I '.
	- 34:54    In general, use active voice instead of passive voice ('are limited').

editor/pages.mdx:
	- 8:4       'Home and Publishing' should use sentence-style capitalization.
	- 10:22     In general, use active voice instead of passive voice ('is split').
	- 12:29     Use the Oxford comma in 'It shows the content files in your repository, including your private pages, whether or'.
	- 71:195    In general, use active voice instead of passive voice ('is restored').


Found 6 suggested changes across 2 files in 1804.62ms