RegExp based G-Code Substitution like in PrusaSlicer

[DHM-projects]

Is there an existing issue for this feature request?

• I have searched the existing issues

Is your feature request related to a problem?

It's related to some extents to:
#6863 - Auxiliary Fan pin cannot be set
#6864 - Pre-heat doesn't work on RepRapFirmware
#6773 - Add Z coordinate when come back to purge tower

There are also many other small customizations that can be improved and bugs that can be worked-around by substituting G-Code after generation.

Which printers will be beneficial to this feature?

All

Describe the solution you'd like

Porting the existing G-Code Substitution feature from PrusaSlicer to OrcaSlicer.

Describe alternatives you've considered

We considered using the Script Post-Processing feature, but it's not a portable solution.
It requires additional software to execute external scripts, which need to be put in a specific folder.
This makes harder to share a complete printer profile.

Additional context

We are aware of two related issues (#2235 and #903), but they were either closed after addressing only the primary issue or completely ignored.
Therefore, we are opening a new issue. This feature would be highly useful in ensuring OrcaSlicer works as expected, even if there is a low-priority bug or missing feature.
It would also be much easier than relying on Script Post-Processing and especially helpful if you need to share a printer profile on multiple computers.

[mattiras]

As I mentioned in #2235
Yes this would be very useful, now I had to take harder way and use Post processing script, which makes sharing profiles difficult. (setting up scripts to work is not easy for everyone)

[galaxyman7]

This would be great to have so I can adjust extrusion ratio for individual feature types.