feat: complete shell revamp

src/program/Clear.ts

@@ -4,7 +4,7 @@ import { Program } from './Program'
 
 export class Clear extends Program {
     async Exec(_: SimpleStream<string>, stdout: SimpleStream<string>, __: Item, ___: string[]): Promise<number> {
-        stdout.emit('\f')
+        stdout.emit('\x1b[2J\x1b[H')
 
         return 0
     }