Custom `fd` args

[MithicSpirit]

Is your feature request related to a problem? Please describe. I have .ignore files in some places to prevent regular fd searches from having some files show up, but I don't want telescope-fb to ignore these files.

Describe the solution you'd like I would like to use the --no-ignore flag to tell fd to not heed the .ignore. Since there are no current options to do this, I believe that the best way would be to add an option for arguments that should be passed to fd. This would also overall increase flexibility.

Describe alternatives you've considered

• I could just use a .gitignore, but that'd annoy me since this isn't a git repo;
• Changing respect_gitignore to use --no-ignore (instead of --no-ignore-vcs), but then the name isn't accurate and there would be significantly different behavior between fd and other backend(s?);
• Adding a new option for --no-ignore (separate from respect_gitignore), but then the interaction between this option and respect_gitignore is unintuitive for new users.

[jamestrew]

I open to adding a no_ignore option.

Little bit hesitant about allowing full control over the all fd args since the picker can't handle that. Also I want to maintain some capability and feature parity between people using fd and those who don't (to be honest, I want to eventually make fd a hard requirement to simply things like this).