feature request(cli): lint directories

[vegerot]

Problem:
I want to run quick-lint on a large project (120k files, 6m SLoC).

Approaches tried:

• quick-lint-js $(fd ...) zsh can't handle that many arguments
• manually calling exec("/usr/local/bin/quick-lint-js", ...) fails because it exceeds NCARGS
• writing my own script that batches calls to quick-lint in batch sizes of NCARGS works but is inconvenient to users

Recommendation:
quick-lint's CLI should also accept a directory. quick-lint will recursively find all appropriate files (.js, .ts, etc.) and lint them.

$ quick-lint-js .

Out of scope:
Respect .gitignore files. This is actually a requirement for my use-case because I don't want to lint node_modules/, dist/, and a bunch of hidden caches my build system creates. This is also the default behavior of fd.

[vegerot]

note: #1166 is an alternative solution

[strager]

Duplicate of #221