fix: add Stream Deck XL and missing device layouts (#10)

## Summary

- `MODEL_LAYOUTS` only contained the Original (20GBA9901) and Virtual
(UI Stream Deck) models
- Any other device — including the **XL (20GAT9902)** — fell through to
the 5×3 fallback in `_resolve_layout()`, making it impossible to address
all 32 keys
- Added: XL (8×4), XL rev2 (8×4), MK.2 (5×3), Mini (3×2), Neo (4×2)

## Test plan

- [x] Verified on a real Stream Deck XL (20GAT9902) — layout now
correctly returns `columns: 8, rows: 4`
- [x] All 32 button positions (0,0 through 7,3) are readable and
writable
- [x] Verify other model IDs if hardware available

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Author: 5 people

profile_manager.py

@@ -63,10 +63,20 @@
 }
 
 MODEL_LAYOUTS: dict[str, dict[str, tuple[int, int]]] = {
-    # Stream Deck (Original)
+    # Stream Deck Original (15 keys)
     "20GBA9901": {KEYPAD: (5, 3)},
+    # Stream Deck MK.2 (15 keys)
+    "20GAA9901": {KEYPAD: (5, 3)},
+    # Stream Deck XL (32 keys)
+    "20GAT9902": {KEYPAD: (8, 4)},
+    # Stream Deck XL rev2 (32 keys)
+    "20GBA9902": {KEYPAD: (8, 4)},
     # Stream Deck + XL (36 keys, 6 dials with 1200x100 touchstrip)
     "20GBX9901": {KEYPAD: (9, 4), ENCODER: (6, 1)},
+    # Stream Deck Mini (6 keys)
+    "20GAI9501": {KEYPAD: (3, 2)},
+    # Stream Deck Neo (8 keys + touchscreen)
+    "20GBD9901": {KEYPAD: (4, 2)},
     # Emulator used by the Elgato desktop app
     "UI Stream Deck": {KEYPAD: (4, 2)},
 }