Add replacements within search commands

[alexjbest]

Running a search and replace with unicode completed text is often useful (e.g. if rintros? produced an ᾰ we want to get rid of).

However currently if I type :s/\s/sigma/g in vim the \s does not replace with sigma.
I understand why this can be annoying by default (especially if the leader is set to \) but this would be a useful option to enable with some keypress, or in a config, even having this work only in the q: buffer (not sure what this is called sorry) would be fine I guess.

[Julian]

I think this is a dupe of #205 -- where we have some ideas for how this could work. And yeah it's super annoying :/

I can try to make some time to look at Gabriel's idea there at least for getting the builtin abbrev expander working.

[alexjbest]

Oh oops looks like you are right! I did search for existing issues but somehow didn't find it with my keywords :)
If you were able to look at this more it would be really cool, no pressure though, I'm very used to working around this so its not a necessary feature in that sense!