Add io (#5)

* Add io lib

* io cleanup

* Run format script

* Fix lint errors with autofix

* Fix equality lint errors

* Rename ioUtil to io-util

* Add no-import-requires

* Run auto-fix lint

* Remove lint errors

* Use Boolean() to convert options

- `CopyOptions` on `cp` now defaults to empty
- Setting option values is easier now

* Rewrite packages/io to be fully async

* Move IS_WINDOWS into ioUtil

* DRY up cp/mv by moving shared code into move function

* Remove unc support, change isDirectory call to stat

* Tighter try catches

* more concise extensions search

* Allow isDirectory to be stat or lstat

* format

* Shell out to rm -rf

* Remove unc comment

* Export fs.promises from io-util

* Remove unknown error message

* Create an optimistic mkdirp

* Update io-util.ts

* Update io-util.ts

* Update io.test.ts

* Fix tests for mkdirP

.eslintrc.json

@@ -26,8 +26,6 @@
     "@typescript-eslint/no-array-constructor": "error",
     "@typescript-eslint/no-empty-interface": "error",
     "@typescript-eslint/no-explicit-any": "error",
-    "no-extra-parens": "off",
-    "@typescript-eslint/no-extra-parens": "error",
     "@typescript-eslint/no-extraneous-class": "error",
     "@typescript-eslint/no-for-in-array": "error",
     "@typescript-eslint/no-inferrable-types": "error",