Allow user Entrypoint scripts (#5194)

* Allow user Entrypoint scripts

* Variable encapsulation

Co-authored-by: Asher <ash@coder.com>

* Check if Entrypoint Dir exists & run all executable

* Don't create entrypoint.d by default

* yarn fmt

* yarn fmt

* Fix for SC2044

* Revert "yarn fmt"

This reverts commit 5ca347f36155ec731587c1ed8437bca332c76693.

Co-authored-by: Asher <ash@coder.com>