Move individual commands to parameters

[savchenko]

Currently fzfx.nvim creates more than 30 (!) individual commands:

How about moving M/W/P/R options into parameters? At minimum, this would save screen space and reduce confusion amongst new adopters.

[linrongbin16]

hi @savchenko, the idea looks pretty good to me, I didn't think in that way!

I will look into it.

[linrongbin16]

This is already done long ago.