Support for underscore prefix

[mertafor]

Housekeeping

• I'm sure this issue is not a duplicate

Information:

Next JS recommends using underscore prefix for folders such as hooks, components etc. in app folder. This might be a new common pattern for other frameworks as well. I know it's possible to add custom icons but is there an easier way to catch folder names with underscore?

For example :
_hooks = hooks
_components = components
_lib = lib
_utils = utils

and so forth.

[ziyafenn]

Created an issue to add a complete Next.js folder pattern support: #3434