feat(unity): enhance visual effects and animations

- Add cloud system with procedural sprites and parallax movement
- Add tree swaying animation for palm trees
- Improve agent breathing with squash & stretch animation
- Add jump animation routine for agent reactions
- Add custom CartoonWater shader support
- Add SetupVisuals editor tool and GlobalProfile asset
- Lower speech bubble alpha for glass effect

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

unity-client/Packages/manifest.json

@@ -43,6 +43,7 @@
     "com.unity.modules.video": "1.0.0",
     "com.unity.modules.vr": "1.0.0",
     "com.unity.modules.wind": "1.0.0",
-    "com.unity.modules.xr": "1.0.0"
+    "com.unity.modules.xr": "1.0.0",
+    "com.unity.postprocessing": "3.4.0"
   }
-}
+}