feat: scaffold element_ae_obj_field_editor_new — parallel-run rewrite of inline field editor

Creates the _new version of the field editor element alongside the working
original (which remains untouched). The _new file starts from the original's
hardened optimistic-update state machine and adds:

- Svelte 5 generics (T) on current_value/draft_value instead of any
- email / url / tel added to the field_type union with edit-mode branches
- object_reload prop removed (was declared, never implemented — on_success
  is and remains the caller's cache-refresh hook)
- to_input_value() / from_input_value() stubs at the two right call sites
  for datetime conversion (both directions, TODO #4 to implement)
- coerce_select_value() stub for select type-mismatch fix (TODO #5)
- Inline TODO mini how-to checked-list mirroring the project doc
- Styling still uses Skeleton classes — tagged for Tailwind/Flowbite swap
  (TODO #6) and a11y gaps marked at their exact markup locations (TODO #7)

Companion files:
- documentation/PROJECT__AE_Obj_Field_Editor_New.md — full plan, migration
  order for all 8 call sites, naming convention note
- documentation/TODO__Agents.md — new entry pointing to the project doc
- documentation/README__Docs_Index.md — project doc added to Active Projects

npx svelte-check: 0 errors, 1 expected benign warning (state_referenced_locally
on the field_type initializer, documented in-file).

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

documentation/TODO__Agents.md

@@ -49,6 +49,12 @@ Axonius DC (June 9) is done — the show happened and the badge layout work that
 
 ---
 
+## 🚧 AE Obj Field Editor — `_new` Rewrite (planning, 2026-06-16)
+
+`element_ae_obj_field_editor.svelte` is getting a parallel-run rewrite: Skeleton UI → Tailwind/Flowbite, removes the dead `object_reload` prop, fixes datetime format conversion (currently the caller's job, one-directional), fixes a latent select-binding type-coercion landmine, adds `email`/`url`/`tel` field types, adds generics for `current_value`/`draft_value`. Both versions run side by side until all 8 call sites are migrated and verified; see `PROJECT__AE_Obj_Field_Editor_New.md` for the full plan and migration order. Not started yet — no code written.
+
+---
+
 ## 🚧 V3 CRUD Migration (Surgical Cleanup)
 Finalizing the 100% adoption of V3 Standard endpoints and retirement of legacy wrappers.