Block Directory: Uninstall blocks that are not being used.

[StevenDufresne]

Description

Attempts to address: #22307

This PR reintroduces code that uninstalls blocks that are added to the document and not used when the post is published.

Part of this feature is exposing the installed blocks in the pre-publish panel.

Original Mockups:

Screenshots

Currently not supporting "Details" under the author.

Description	Screenshot
The user could have added 5 blocks, but only the ones that are used in the document show up in the pre-publish panel.

Types of changes

• Introduces a plugin that ties into PluginPrePublishPanel slot.
• Attaches an uninstall component to the state that uninstalls unused blocks when user publishes post.

TO DO

• We need a better way to persist the installed blocks. We currently add it to the store. However, if the page is refreshed, the state is lost and blocks are not uninstalled.

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR.

[github-actions]

Size Change: +1.38 kB (0%)

Total Size: 1.11 MB

Filename	Size	Change
build/annotations/index.js	3.62 kB	+2 B (0%)
build/block-directory/index.js	8.19 kB	+1.26 kB (15%)	⚠️
build/block-directory/style-rtl.css	897 B	+107 B (11%)	⚠️
build/block-directory/style.css	899 B	+108 B (12%)	⚠️
build/block-editor/index.js	105 kB	-3 B (0%)
build/block-library/index.js	119 kB	-1 B
build/block-serialization-default-parser/index.js	1.88 kB	-1 B
build/components/index.js	182 kB	-9 B (0%)
build/compose/index.js	6.67 kB	-2 B (0%)
build/core-data/index.js	11.4 kB	+1 B
build/data/index.js	8.43 kB	+2 B (0%)
build/date/index.js	5.47 kB	+2 B (0%)
build/deprecated/index.js	771 B	-1 B
build/edit-navigation/index.js	6.6 kB	-2 B (0%)
build/edit-post/index.js	302 kB	-2 B (0%)
build/edit-site/index.js	12.8 kB	-3 B (0%)
build/edit-widgets/index.js	7.73 kB	+1 B
build/editor/index.js	44.3 kB	-72 B (0%)
build/format-library/index.js	7.63 kB	-1 B
build/hooks/index.js	2.13 kB	+1 B
build/keyboard-shortcuts/index.js	2.51 kB	-1 B
build/keycodes/index.js	1.94 kB	-1 B
build/list-reusable-blocks/index.js	3.13 kB	+1 B
build/media-utils/index.js	5.29 kB	-4 B (0%)
build/notices/index.js	1.79 kB	+1 B
build/nux/index.js	3.4 kB	-1 B
build/plugins/index.js	2.56 kB	+2 B (0%)
build/rich-text/index.js	14.8 kB	-1 B
build/token-list/index.js	1.28 kB	-1 B
build/url/index.js	4.02 kB	+1 B
build/warning/index.js	1.14 kB	+1 B

ℹ️ View Unchanged

Filename	Size	Change
build/a11y/index.js	1.02 kB	0 B
build/api-fetch/index.js	3.39 kB	0 B
build/autop/index.js	2.83 kB	0 B
build/blob/index.js	620 B	0 B
build/block-editor/style-rtl.css	10.8 kB	0 B
build/block-editor/style.css	10.8 kB	0 B
build/block-library/editor-rtl.css	7.22 kB	0 B
build/block-library/editor.css	7.22 kB	0 B
build/block-library/style-rtl.css	7.48 kB	0 B
build/block-library/style.css	7.48 kB	0 B
build/block-library/theme-rtl.css	683 B	0 B
build/block-library/theme.css	685 B	0 B
build/block-serialization-spec-parser/index.js	3.1 kB	0 B
build/blocks/index.js	48.1 kB	0 B
build/components/style-rtl.css	17.1 kB	0 B
build/components/style.css	17.1 kB	0 B
build/data-controls/index.js	1.29 kB	0 B
build/dom-ready/index.js	568 B	0 B
build/dom/index.js	3.11 kB	0 B
build/edit-navigation/style-rtl.css	857 B	0 B
build/edit-navigation/style.css	856 B	0 B
build/edit-post/style-rtl.css	12.2 kB	0 B
build/edit-post/style.css	12.2 kB	0 B
build/edit-site/style-rtl.css	5.22 kB	0 B
build/edit-site/style.css	5.22 kB	0 B
build/edit-widgets/style-rtl.css	4.59 kB	0 B
build/edit-widgets/style.css	4.59 kB	0 B
build/editor/editor-styles-rtl.css	425 B	0 B
build/editor/editor-styles.css	428 B	0 B
build/editor/style-rtl.css	5.07 kB	0 B
build/editor/style.css	5.08 kB	0 B
build/element/index.js	4.65 kB	0 B
build/escape-html/index.js	733 B	0 B
build/format-library/style-rtl.css	502 B	0 B
build/format-library/style.css	502 B	0 B
build/html-entities/index.js	622 B	0 B
build/i18n/index.js	3.56 kB	0 B
build/is-shallow-equal/index.js	711 B	0 B
build/list-reusable-blocks/style-rtl.css	226 B	0 B
build/list-reusable-blocks/style.css	226 B	0 B
build/nux/style-rtl.css	616 B	0 B
build/nux/style.css	613 B	0 B
build/primitives/index.js	1.5 kB	0 B
build/priority-queue/index.js	789 B	0 B
build/redux-routine/index.js	2.85 kB	0 B
build/server-side-render/index.js	2.68 kB	0 B
build/shortcode/index.js	1.7 kB	0 B
build/viewport/index.js	1.84 kB	0 B
build/wordcount/index.js	1.17 kB	0 B

_{compressed-size-action}

[ryelle]

The changes in this PR have been split out & merged in #22752 & #22918, so I'm going to close this.