feat: working filesystem

src/program/Mkdir.ts

@@ -0,0 +1,23 @@
+import { Item } from '../fs/Item'
+import type { SimpleStream } from '../utils/SimpleStream'
+import { Program } from './Program'
+
+export class Mkdir extends Program {
+    constructor() {
+        super()
+    }
+
+    async Exec(_: SimpleStream<string>, stdout: SimpleStream<string>, workdir: Item, args: string[]): Promise<number> {
+        const item = await Item.openDir(args[1])
+        stdout.emit(`does ${args[1]} exist? ${await item.Exists()}\n`)
+
+        if (await item.Exists()) {
+            stdout.emit(`mkdir: directory ${item.GetPath()} already exists.\n`)
+            return 1
+        }
+
+        item.Create()
+
+        return 0
+    }
+}