Refactor document actions to handle template part titles

[noahtallen]

Description

Resolves #25878. This refactors the DocumentActions component in the following ways:

1. Remove the prop for a template object
2. Add props for entityTitle and entityLabel so that the component can be used for generic entities.
3. Pass React children to the dropdown component so that the actions area is not tightly coupled to the content which could be shown there.

We then utilize these changes in the header component so that:

1. The entityTitle can changed based on the entity being edited (so it now shows the template part slug when zoomed into a template part).
2. Only render dropdown content when displaying a template so that we don't show a unnecessary content for the template part.

Visually, the only difference should be that when you switch to a template part in the sidebar, it now displays the template part slug as the document title.

How has this been tested?

Locally in edit site.

Screenshots

Types of changes

Enhancement

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: +167 B (0%)

Total Size: 1.19 MB

Filename	Size	Change
build/edit-site/index.js	21.3 kB	+167 B (0%)

ℹ️ View Unchanged

Filename	Size	Change
build/a11y/index.js	1.14 kB	0 B
build/annotations/index.js	3.54 kB	0 B
build/api-fetch/index.js	3.35 kB	0 B
build/autop/index.js	2.72 kB	0 B
build/blob/index.js	668 B	0 B
build/block-directory/index.js	8.6 kB	0 B
build/block-directory/style-rtl.css	943 B	0 B
build/block-directory/style.css	942 B	0 B
build/block-editor/index.js	130 kB	0 B
build/block-editor/style-rtl.css	10.9 kB	0 B
build/block-editor/style.css	10.9 kB	0 B
build/block-library/editor-rtl.css	8.65 kB	0 B
build/block-library/editor.css	8.65 kB	0 B
build/block-library/index.js	142 kB	0 B
build/block-library/style-rtl.css	7.71 kB	0 B
build/block-library/style.css	7.71 kB	0 B
build/block-library/theme-rtl.css	741 B	0 B
build/block-library/theme.css	741 B	0 B
build/block-serialization-default-parser/index.js	1.78 kB	0 B
build/block-serialization-spec-parser/index.js	3.1 kB	0 B
build/blocks/index.js	47.6 kB	0 B
build/components/index.js	169 kB	0 B
build/components/style-rtl.css	15.4 kB	0 B
build/components/style.css	15.4 kB	0 B
build/compose/index.js	9.63 kB	0 B
build/core-data/index.js	12.1 kB	0 B
build/data-controls/index.js	684 B	0 B
build/data/index.js	8.63 kB	0 B
build/date/index.js	31.9 kB	0 B
build/deprecated/index.js	772 B	0 B
build/dom-ready/index.js	569 B	0 B
build/dom/index.js	4.43 kB	0 B
build/edit-navigation/index.js	10.6 kB	0 B
build/edit-navigation/style-rtl.css	868 B	0 B
build/edit-navigation/style.css	871 B	0 B
build/edit-post/index.js	306 kB	0 B
build/edit-post/style-rtl.css	6.37 kB	0 B
build/edit-post/style.css	6.35 kB	0 B
build/edit-site/style-rtl.css	3.81 kB	0 B
build/edit-site/style.css	3.82 kB	0 B
build/edit-widgets/index.js	21.6 kB	0 B
build/edit-widgets/style-rtl.css	3.09 kB	0 B
build/edit-widgets/style.css	3.09 kB	0 B
build/editor/editor-styles-rtl.css	480 B	0 B
build/editor/editor-styles.css	482 B	0 B
build/editor/index.js	42.4 kB	0 B
build/editor/style-rtl.css	3.85 kB	0 B
build/editor/style.css	3.84 kB	0 B
build/element/index.js	4.45 kB	0 B
build/escape-html/index.js	733 B	0 B
build/format-library/index.js	7.49 kB	0 B
build/format-library/style-rtl.css	547 B	0 B
build/format-library/style.css	548 B	0 B
build/hooks/index.js	1.74 kB	0 B
build/html-entities/index.js	622 B	0 B
build/i18n/index.js	3.54 kB	0 B
build/is-shallow-equal/index.js	709 B	0 B
build/keyboard-shortcuts/index.js	2.39 kB	0 B
build/keycodes/index.js	1.85 kB	0 B
build/list-reusable-blocks/index.js	3.02 kB	0 B
build/list-reusable-blocks/style-rtl.css	476 B	0 B
build/list-reusable-blocks/style.css	476 B	0 B
build/media-utils/index.js	5.12 kB	0 B
build/notices/index.js	1.69 kB	0 B
build/nux/index.js	3.27 kB	0 B
build/nux/style-rtl.css	671 B	0 B
build/nux/style.css	668 B	0 B
build/plugins/index.js	2.44 kB	0 B
build/primitives/index.js	1.34 kB	0 B
build/priority-queue/index.js	789 B	0 B
build/redux-routine/index.js	2.85 kB	0 B
build/reusable-blocks/index.js	3.04 kB	0 B
build/rich-text/index.js	13 kB	0 B
build/server-side-render/index.js	2.6 kB	0 B
build/shortcode/index.js	1.7 kB	0 B
build/token-list/index.js	1.24 kB	0 B
build/url/index.js	4.07 kB	0 B
build/viewport/index.js	1.75 kB	0 B
build/warning/index.js	1.13 kB	0 B
build/wordcount/index.js	1.17 kB	0 B

_{compressed-size-action}

[vindl]

This is working well for me but I left one question about organizing code.

[Copons]

Note: this could use the same "View in navigation" flow introduced in #26003, which means that eventually template parts too would maybe need a dropdown.
(Maybe they could have a description/excerpt as well?)

[noahtallen]

which means that eventually template parts too would maybe need a dropdown.

Unsure, I don't think there have been any design explorations on this yet

[jeyip]

I can confirm that this works as expected in Chrome, Firefox, Safari, Edge, and IE11. 🚀

[vindl]

This works as expected but the PR needs to be rebased now.

[vindl]

LGTM 🚀