[Feature] lower/upper case in replacement

[Loceka]

Hello,

Could it be possible to allow case control in regex replacement, like it is done in Notepad++ for example ( https://npp-user-manual.org/docs/searching/#substitutions ) :

• \l ⇒ Causes next character to output in lowercase
• \L ⇒ Causes next characters to be output in lowercase, until a \E is found
• \u ⇒ Causes next character to output in uppercase
• \U ⇒ Causes next characters to be output in uppercase, until a \E is found
• \E ⇒ Puts an end to forced case mode initiated by \L or \U

It would be a really nice to have feature.