[MOOSE-373] FE: Add MediaImageControl Component

[GeoffDusome]

What does this do/fix?

Introduces a reusable MediaImageControl for the block editor sidebar and refactors the image card and image overlay card blocks to use it, so image pick/preview/replace/remove behavior lives in one place.

What changed

• MediaImageControl (assets/js/components/MediaImageControl.js) — Featured-image–style UI: choose image, preview (with ResponsiveWrapper when dimensions exist), replace/remove actions, loading spinner + VisuallyHidden text, missing-attachment messaging, and inline layout styles so editor polish stays in the component file (no new stylesheet).
• useBlockMedia (assets/js/hooks/useBlockMedia.js) — Subscribes to attachment data via getEntityRecord( 'postType', 'attachment', … ) and hasFinishedResolution, matching core’s direction instead of the legacy getMedia shortcut; exposes media, isLoading, isMissing, and hasResolved.
• image-card and image-overlay-card — Removed duplicated MediaUpload / withSelect boilerplate; each block keeps onSelect / onRemove + mediaId and delegates UI to MediaImageControl.
• Webpack — Adds a hooks resolve alias pointing at assets/js/hooks (same idea as the existing components alias).

Why

• Less duplication when adding similar blocks.
• Clear loading and missing states in the inspector.
• Data loading aligned with current core-data attachment APIs.

QA

Links to relevant issues

• Link to Issue

Screenshots/video:

• Media Image Control component: https://p.tri.be/i/PZf6CH

Dev Environment URL:

• http://moose-dev-pr340.d1.moderntribe.qa/

Pull request checklist

• I've added a changelog entry for these changes.
• I've linked to a relevant Jira issue.
• I've captured a screenshot or screencast of the changes and linked it above.

[dpellenwood]

🍏 Lovely improvement!