Add a command-line cline powered by deno

cli/deno.d.ts

@@ -0,0 +1,40 @@
+declare namespace Deno {
+  export const args: string[];
+  export function exit(code?: number): never;
+  export const env: {
+    get(key: string): string | undefined;
+  };
+  export function cwd(): string;
+  export function readTextFile(path: string): Promise<string>;
+  export function writeTextFile(path: string, data: string): Promise<void>;
+  export function mkdir(path: string, options?: { recursive?: boolean }): Promise<void>;
+  export function readDir(path: string): AsyncIterable<{
+    name: string;
+    isFile: boolean;
+    isDirectory: boolean;
+  }>;
+  export function stat(path: string): Promise<{
+    isFile: boolean;
+    isDirectory: boolean;
+  }>;
+  export class Command {
+    constructor(cmd: string, options?: {
+      args?: string[];
+      stdout?: "piped";
+      stderr?: "piped";
+    });
+    output(): Promise<{
+      stdout: Uint8Array;
+      stderr: Uint8Array;
+    }>;
+  }
+  export const permissions: {
+    query(desc: { name: string; path?: string }): Promise<{ state: "granted" | "denied" }>;
+  };
+  export const errors: {
+    PermissionDenied: typeof Error;
+  };
+  export const stdout: {
+    write(data: Uint8Array): Promise<number>;
+  };
+}