fix(build): map pixi.js in tsconfig paths for client pixiPatch.ts

vite.config already aliases pixi.js to the renderer's copy, but tsconfig had no
matching path, so tsgo could not resolve the client-side import in src/pixiPatch.ts
(merge-introduced). Mirror the vite alias. Fixes TS2307.

tsconfig.json

@@ -25,6 +25,9 @@
             ],
             "@/*": [
                 "./src/*"
+            ],
+            "pixi.js": [
+                "../Nitro_Render_V3/node_modules/pixi.js"
             ]
         }
     },