the addon arc: the AddOns folder opens

- benilla loads real 1.12 addons from Interface/AddOns — TOC, XML and Lua through one loader, with per-addon saved variables, Bindings.xml and the lifecycle events addons expect
- both AddOns screens are in: the character-select list with per-addon enable state, and the ESC menu's in-game list
- the API surface is measured, not guessed — a corpus harness runs hundreds of real 1.12 addons and ranks exactly which globals, templates and verbs they demand
- the Lua dialect is the client's own, read off the binary — 5.0 semantics with the 1.12 additions, and UI source files are bytes, not UTF-8

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

crates/benilla-app/src/ui_script/micro_menu_tests.rs

@@ -1,5 +1,5 @@
 //! The shipped `assets/ui/MicroMenu.xml` — the eight micro buttons in the main bar's right-hand
-//! recess — loaded behind `ActionBar.xml` (their anchor target `BenillaActionBarArtFrame` and the
+//! recess — loaded behind `ActionBar.xml` (their anchor target `MainMenuBarArtFrame` and the
 //! `BenillaActionBarArt_SeatAbove` seating helper) into a bare engine.
 //!
 //! What these guard, in order: the row's ref geometry (29×58 at art-frame BOTTOMLEFT +(552,2), a
@@ -174,7 +174,7 @@ fn a_micro_button_pushes_while_its_panel_is_open() {
     let s = harness();
     s.run(
         r#"
-        local f = CreateFrame("Frame", "BenillaCharacterFrame")
+        local f = CreateFrame("Frame", "CharacterFrame")
         f:SetPoint("CENTER", 0, 0); f:SetSize(100, 100); f:Hide()
     "#,
     )
@@ -187,11 +187,11 @@ fn a_micro_button_pushes_while_its_panel_is_open() {
     s.run("UpdateMicroButtons()").unwrap();
     assert_eq!(state(&s), "NORMAL", "closed panel ⇒ button up");
 
-    s.run("BenillaCharacterFrame:Show(); UpdateMicroButtons()")
+    s.run("CharacterFrame:Show(); UpdateMicroButtons()")
         .unwrap();
     assert_eq!(state(&s), "PUSHED", "open panel ⇒ button held down");
 
-    s.run("BenillaCharacterFrame:Hide(); UpdateMicroButtons()")
+    s.run("CharacterFrame:Hide(); UpdateMicroButtons()")
         .unwrap();
     assert_eq!(state(&s), "NORMAL", "closed again ⇒ button pops back");