Powertoys: [Power Rename] Add incrementing number (counter) RegEx feature

[qsek1]

It is essential to be able to use incrementing numbers for file renaming.
You already have the Enumerate Item option, but it is limited and sometimes not suitable.
For example what if i wanted my counter start at 15, or i don't want the encapsulating round brackets.

Please consider implementing the Regular Expression Counter Operations:
https://www.funduc.com/regexp.htm#Regular%20Expression%20Counters
http://searchandreplace.helpmax.net/en/regular-expressions/regular-expression-counters/

It is in the format %1>15> (which substitutes $1) and means: use the first match in the expression and increment each match starting with number 15.
If no starting value is given %1>> would use the starting value of the first match found.

[uzairali001]

This feature will the really great to have

[enricogior]

We'll try to have it done for 0.21

[crutkas]

moving out since it is outside our prioritize backlog. https://github.com/microsoft/PowerToys/wiki/Roadmap#backlog-priority-list-in-order