feat: support parameter patterns

[Kakulukian]

I'm planning to move to the newer version of path-to-regexp. In our codebase heavily relies on regex for parameter validation, especially in some legacy components we still have running in production.

I stumbled across this comment that mentions parameter pattern support might be coming in future versions. Based on that, I went ahead and implemented the functionality in this PR.

Feel free to ignore this PR if it doesn't align with the project's direction. I understand you may have different plans for handling parameter patterns in future versions!

[blakeembrey]

@Kakulukian I wanted to let you know ASAP that I really appreciate the PR! It is the right direction, but unfortunately it's even more involved than this because I want to add it back in a way that ensures it still generates safe regexes. That sadly means more of a regex parser.

The good news, if you're interested, is that we could start with a very simple "parser" by rejecting all meta characters except |. Then add other use-cases one by one. Would that work for you?

Assuming you're up for it, I'll also separately leave some review comments.

[Kakulukian]

@Kakulukian I wanted to let you know ASAP that I really appreciate the PR! It is the right direction, but unfortunately it's even more involved than this because I want to add it back in a way that ensures it still generates safe regexes. That sadly means more of a regex parser.

The good news, if you're interested, is that we could start with a very simple "parser" by rejecting all meta characters except |. Then add other use-cases one by one. Would that work for you?

Assuming you're up for it, I'll also separately leave some review comments.

That's ok for me, updated with your suggestions :)

[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 98.17%. Comparing base (26d87a2) to head (eaf19ce). :warning: Report is 40 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##            master     #362      +/-   ##
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- Coverage   100.00%   98.17%   -1.83%     
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  Files            1        1              
  Lines          668      439     -229     
  Branches       151      155       +4     
===========================================
- Hits           668      431     -237     
- Misses           0        8       +8     

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