feat: add some utilities

src/program/Lsprg.ts

@@ -0,0 +1,19 @@
+import type { Wush } from '../shell/Wush'
+import type { SimpleStream } from '../utils/SimpleStream'
+import { Program } from './Program'
+
+export class Lsprg extends Program {
+    private wush: Wush
+
+    constructor(wush: Wush) {
+        super()
+        this.wush = wush
+    }
+
+    async Exec(_: SimpleStream<string>, stdout: SimpleStream<string>, __: string[]): Promise<number> {
+        for (const program in this.wush.GetPrograms())
+            stdout.emit(`${program}\n`)
+
+        return 0
+    }
+}