fix: self core imports

packages/core/src/blitz/canSplash.ts

@@ -1,5 +1,5 @@
-import { type ShellDefinition, ShellType } from '@blitzkit/core';
+import { ShellDefinition, ShellType } from "../protos";
 
-export function canSplash(type: ShellDefinition['type']): type is ShellType.HE {
+export function canSplash(type: ShellDefinition["type"]): type is ShellType.HE {
   return type === ShellType.HE;
 }