Allow plain Python literals in regexp function wrappers

[renato2099]

Which issue does this PR close?

Closes#1446.

Rationale for this change

Make regex functions more pythonic

What changes are included in this PR?

Changes to regex functions such that we can improve their usability by making them more pythonic

Are there any user-facing changes?

Regex functions are more pythonic now

[timsaucer]

This is a nice addition. I think we should update the docstrings to not have lit() since we can take these values directly now.

[timsaucer]

Also worth noting is I've been working on a skill that will do these in a more automated way: #1484 It might be worth comparing what you came up with vs the agent.

[renato2099]

Also worth noting is I've been working on a skill that will do these in a more automated way: #1484 It might be worth comparing what you came up with vs the agent.

oh very cool @timsaucer !
let me give that a try as well, I might need to install claude in my personal laptop because I can't install it on my work laptop :)

[timsaucer]

Closing in favor of the already merged #1484

This is great work! Sorry we overlapped.