wip: replace packages with pure files

packages/game/Exception.ts

@@ -0,0 +1,18 @@
+/* eslint-disable max-classes-per-file */
+import { Event } from './Event'
+import { IStageException, IGlobalException } from './schema/exception'
+
+export class StageException extends Event {
+  readonly catchAll: boolean
+
+  constructor({ id, condition, response, catchAll }: IStageException) {
+    super(id, condition, response)
+    this.catchAll = catchAll
+  }
+}
+
+export class GlobalException extends Event {
+  constructor({ id, condition, response, requirements }: IGlobalException) {
+    super(id, condition, response, requirements)
+  }
+}