Add tool to visualise regular expressions

[hason]

• https://regexper.com/
• https://jex.im/regulex/

[ggrossetie]

Hello @hason

That's a great idea but I'm a bit concerned about the low activity on these projects. Regulex rendering is really neat but the whole project has been written by only one person and he does not seem to be around. Same is true about Regexper with only one contributor and the last commit is one year ago.

Ideally, I want to add tools with an active community. Do you know if there are other alternatives?

[silopolis]

Having them in Kroki would give them a lot of publicity. Reciprocally, providing a regex visualizer to users would surely be something appreciated.