Register rich text format keyboard shortcuts

[kraftbj]

Summary

Import @wordpress/format-library to register standard rich text format types and their keyboard shortcuts. Press This uses BlockEditorProvider directly rather than the full EditorProvider, which means format-library isn't initialized automatically. Without it, shortcuts like Ctrl+K (link), Ctrl+B (bold), and Ctrl+I (italic) don't work.

• Add @wordpress/format-library as a dependency
• Import it in the entry point so it registers format types on load
• Add docs/keyboard-shortcuts.md documenting which Gutenberg shortcuts are available in Press This and which aren't

See #81

Test plan

• Open Press This and type some text in a paragraph block
• Ctrl+B / Cmd+B should toggle bold
• Ctrl+I / Cmd+I should toggle italic
• Ctrl+K / Cmd+K should open the link popover
• Ctrl+U / Cmd+U should toggle underline
• Ctrl+Alt+D / Ctrl+Option+D should toggle strikethrough
• Ctrl+Alt+X / Ctrl+Option+X should toggle inline code
• Verify the block toolbar shows formatting buttons (bold, italic, link)

[Copilot]

Pull request overview

This PR restores standard Gutenberg rich-text formatting shortcuts in Press This by ensuring core format types are registered when the app boots (since Press This uses BlockEditorProvider rather than EditorProvider).

Changes:

• Add @wordpress/format-library as an application dependency.
• Import @wordpress/format-library in the JS entry point so format types/shortcuts register on load.
• Add documentation describing which keyboard shortcuts are (and aren’t) available in Press This.

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 1 comment.

File	Description
src/index.js	Imports @wordpress/format-library at startup to register core rich-text formats and shortcuts.
package.json	Adds @wordpress/format-library to dependencies.
package-lock.json	Locks the newly added dependency and resulting transitive dependency graph updates.
docs/keyboard-shortcuts.md	Documents available/unavailable shortcuts in Press This vs the full editor.

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[Copilot]

Adding @wordpress/format-library updates the lockfile to include @wordpress/ui which declares engines of Node >=20.10.0 and npm >=10.2.3 (see package-lock). To avoid confusing install-time engine warnings (or failures when engine-strict is enabled), consider declaring an explicit engines requirement in this repo’s package.json (and aligning CI/tooling accordingly).