add character to clientstate and add sprint system

src/ReplicatedStorage/ecs/state.ts

@@ -1,14 +1,14 @@
 /* eslint-disable roblox-ts/no-private-identifier */
 
+import { CharacterRigR6 } from "@rbxts/character-promise"
 import { InputKind } from "ReplicatedStorage/inputKind"
 
 /**
  * The client ECS state.
  */
 export class clientState {
-	[index: string]: unknown,
+	character?: CharacterRigR6
 	debugEnabled = false
-	isJumping = false
 	isRunning = false
 	lastProcessedCommand?: InputKind
 }