implement shell command interface and add basic commands (echo, ls, pwd, cd, touch, cat, rm) with syscall integration

src/shell/commands/rm.ts

@@ -0,0 +1,24 @@
+import { IShellCommand } from "./IShellCommand";
+import { ShellSyscall } from "../ShellSyscall";
+
+export class rm implements IShellCommand {
+    private syscall: ShellSyscall;
+
+    constructor(syscall: ShellSyscall) {
+        this.syscall = syscall;
+    }
+
+    getName(): string {
+        return "rm";
+    }
+
+    execute(args: string[]): string {
+        if (args.length < 1) {
+            return "Usage: rm <filename>";
+        }
+
+        const filename = args[0];
+        this.syscall.deleteFile(filename);
+        return `Removed ${filename}`;
+    }
+}