[IMAGE EDITOR] Build DotImageEditorComponent modal shell and image-editor signalStore

[nicobytes]

Description

Create the full-screen image editor modal shell matching the Lara design: dark canvas, left tool rail (move / crop / focal), right-side panels container, bottom Cancel / Download / Save bar, preview address field, and zoom/fit controls. State lives in an NgRx signalStore (image-editor.store.ts).

Acceptance Criteria

• DotImageEditorComponent standalone, OnPush, PrimeNG + Tailwind (Lara).
• ImageEditorStore holds asset context, adjust/transform/crop/fileInfo/focalPoint/zoom state.
• Header, canvas area, tool rail, panel column, and footer action bar match design spec.
• data-testid on primary controls.
• i18n keys added to Language.properties for editor labels.

Priority

High

Additional Context

• Epic: Edit Content Screen — GTM #35846
• Design: linked from Edit Content Screen — GTM #35846
• Depends on: [IMAGE EDITOR] Define IMAGE_EDITOR_LAUNCHER seam with legacy Dojo and no-op launchers #36056, AngularImageEditorLauncher task