chore: move tiptap scss to styles/, trash orphaned codemirror files, update project doc

- element_tiptap_editor.scss → elements/styles/ (single importer path updated)
- Trashed element_codemirror_editor.svelte and element_codemirror_editor_wrapper.svelte (zero importers — active component is element_editor_codemirror.svelte)
- PROJECT__AE_Object_Field_Editor_V3_upgrade.md: mark v1/v2 removal complete, update status to 🟡 Mostly Complete

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

documentation/PROJECT__AE_Object_Field_Editor_V3_upgrade.md

@@ -1,7 +1,7 @@
 # Project Plan: Aether AE Obj Field Editor v3 (Consolidated)
 
-> **Status:** 🔵 Active / Testing & Stabilization
-> **Date:** February 13, 2026
+> **Status:** 🟡 Mostly Complete — Phase 3 items + GUIDE update remaining
+> **Date:** February 13, 2026 (last updated: 2026-03-20)
 > **Target Component:** `src/lib/elements/element_ae_obj_field_editor_v3.svelte`
 > **Replaces:** `element_ae_crud.svelte` and `element_ae_crud_v2.svelte`
 
@@ -37,7 +37,7 @@ Consolidate the legacy CRUD components into a single, high-performance "Aether O
 
 ### Phase 4: Migration & Cleanup
 - [x] Create a playground route for V3 verification (`/testing/ae_obj_field_editor_v3`).
-- [ ] Deprecate and eventually remove `v1` and `v2` files.
+- [x] Deprecate and remove `v1` and `v2` files — `element_ae_crud.svelte` and `element_ae_crud_v2.svelte` removed 2026-03-20.
 - [ ] Update `GUIDE__Development.md` with the new usage patterns.
 
 ## ⚠️ Security & Reliability Stabilization (NEW)