Suggest mode 6/7: review UI (Apply / Reject sidebar and summary)

[adamsilverstein]

What's in this PR

Adds the sidebar review surface: SuggestionActions renders the Accept /
Reject affordance in a note's header, resolves the marked text for inline
suggestions on read, and shows a Docs-style Add / Delete / Format summary
(SuggestionSummary + word-diff). The notes list hides the generic Resolve
button for suggestion notes so the checkmark isn't duplicated, and the note
toolbar's Add-note button stays active while a suggestion is being composed.

---

Suggest mode stack

This rebuilds the manually-stacked Suggest mode work (#73411) as a GitHub Stack of 7 small, independently reviewable PRs. Each is CI-green on its own and builds on the one below it:

1. #80427 - editor intent (edit/suggest/view) + experiment gate
2. #80428 - suggestion storage, REST controller, provider
3. #80429 - block-level capture (attribute + structural)
4. #80430 - inline marker primitive
5. #80431 - inline suggestion operations
6. #80432 - review UI (Apply/Reject sidebar + summary)
7. #80433 - inline live wiring, docs, e2e

The whole feature can be exercised end-to-end via the combined testing branch #78994 (Playground). Behind the "Suggestion Mode" experiment (Gutenberg > Experiments).

[github-actions]

Size Change: +3.7 kB (+0.05%)

Total Size: 7.75 MB

📦 View Changed

Filename	Size	Change
build/scripts/editor/index.min.js	512 kB	+3.04 kB (+0.6%)
build/styles/editor/style-rtl.css	31.4 kB	+184 B (+0.59%)
build/styles/editor/style-rtl.min.css	26.7 kB	+150 B (+0.56%)
build/styles/editor/style.css	31.5 kB	+175 B (+0.56%)
build/styles/editor/style.min.css	26.7 kB	+150 B (+0.57%)

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