[max-line-length] ignore strings and regex in max line length

[vmk1vmk]

PR checklist

• Addresses an existing issue: fixes max-line-length with template literals #3905
• New feature, bugfix, or enhancement
  • Includes tests
• Documentation update

Overview of change:

Added functionality to ignore strings exceeding the max line length, it is by default enabled.
Added option check-strings to control if exceeding strings are skipped or treated as errors.
Added the same option for regex called check-regex.

Is there anything you'd like reviewers to focus on?

• Are all "string"-cases covered?
• Does this new functionality behave as expected?
• Should it be split into different options like check-plain-strings and check-template-strings?

CHANGELOG.md entry:

[enhancement] Added check-strings and check-regex options to max-line-lenght rule.

[vmk1vmk]

Failing in testNext because of #4784

[JoshuaKGoldberg]

Mostly LGTM, thanks for sending this in! A few requested changes around readability.

[vmk1vmk]

@JoshuaKGoldberg Thanks for reviewing so fast. I made all requested changes.
How about the functionality and the options? Do you think they should be more granular like check-strings and check-template-strings?

[JoshuaKGoldberg]

How about the functionality and the options? Do you think they should be more granular like check-strings and check-template-strings?

No, this looks fine. TSLint's being deprecated soon (#4534) and has been recommending using Prettier instead of formatting rules for quite some time. I don't think that extra logic will be worth the added complexity.

Are all "string"-cases covered?
Does this new functionality behave as expected?

Looks good! 😄 I played around with this locally a bit and it worked great.

[JoshuaKGoldberg]

Great! Thanks for sending this in @vmk1vmk! 🙌