feat: Added remove field to playground

[screensaversclub]

• Create new RegExp from user input
• "global" and "ignore case" flags are exposed as checkboxes to user
• Tested with simple regex like /[aeiou]/gi (remove vowels) or /(?<= )((a)|(an)|(the))(?= )/gi (remove a/an/the with both positive and negative lookahead for space character)

[screensaversclub]

Closing to clean up commit history before PRing again

[Trott]

Closing to clean up commit history before PRing again

Opening a new PR is fine, but you can also do a git rebase -i or whatever you do to clean up the commit history, and then force push to the PR branch.

[screensaversclub]

Thanks! I'll try that next time