fix: remove Trump pet from bundled community pets (#1103)

Fixes #1042

Problem:
The Trump pet was included in the bundled community pets catalog, which
appeared in the Built-in pet adoption picker. This raised concerns about
keeping politically-charged content in the default pet selection.

Solution:
- Removed the trump pet directory from assets/community-pets/
- Removed 'trump' from the BUNDLED_PETS list in bake-community-pets.ts

The pet is still available on Codex Pet Share for users who want to
download it manually, but it no longer ships as a built-in option.

Impact:
- Trump pet no longer appears in the default pet adoption picker
- Users can still access it via "Download community pets" if desired
- Keeps the built-in pet selection neutral and welcoming

Related:
- PR #850 (previous attempt that was closed without merging)

assets/community-pets/trump/pet.json

@@ -1,10 +0,0 @@
-{
-  "id": "trump",
-  "displayName": "Trump",
-  "description": "A small smooth-edged digital pet caricature inspired by Donald Trump.",
-  "spritesheetPath": "spritesheet.webp",
-  "author": "claumarin",
-  "tags": [],
-  "source": "codex-pet-share",
-  "sourceUrl": "https://codex-pet-share.pages.dev/#/pets/trump"
-}

scripts/bake-community-pets.ts

@@ -27,7 +27,6 @@ const BUNDLED_PETS = [
   'dario',
   'nyako-shigure',
   'slavik',
-  'trump',
   'tux',
   'yelling-dario',
   'yorha-sit-2b',