docs(regex-vis): add Regex visualizer & editor

[ViktorSvertoka]

Added Regex visualizer & editor

Features:

Visualizing regular expressions
Visual editing of regular expressions
Testing of regular expressions

Link: https://github.com/Bowen7/regex-vis

Checklist:

• I've read and understood Contributing Guidelines.
• I've added the new resource at the end of its section.
• This resource is out there for a while, and actively maintained.
• This resource is popular enough and has at least a few hundred stars on GitHub.

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[ViktorSvertoka]

[gokaygurcan]

Nice project, I wish there was a chance to zoom in/out in relatively big outputs. I didn't like the constant scroll left, right, up and down to read the output. That might only be me :D

Thanks for the addition.