feat: initial CLI structure

- init: create plugin boilerplate
- install: install from local path with deps
- list: show installed plugins
- validate: check manyplug.json syntax

node_modules/fs-extra/lib/remove/index.js

@@ -0,0 +1,17 @@
+'use strict'
+
+const fs = require('graceful-fs')
+const u = require('universalify').fromCallback
+
+function remove (path, callback) {
+  fs.rm(path, { recursive: true, force: true }, callback)
+}
+
+function removeSync (path) {
+  fs.rmSync(path, { recursive: true, force: true })
+}
+
+module.exports = {
+  remove: u(remove),
+  removeSync
+}