Provide a portable fallback for fzf

[barracuda156]

fzf requires Go, which is broken on some platforms (for example, any OS on ppc arch). Please consider adding a portable fallback for it (sentaku, rofi or whatever may suite).

[Benjamin-Loison]

For reference:

matrix-commander/README.md

Lines 439 to 440 in 8a123a8

	- `matrix-commander-tui` requires that you install `fzf`.
	- Read https://github.com/junegunn/fzf#installation for installation instructions.

[barracuda156]

This is a disappointing decision on the part of olm upstream. Another victim of “rewrite it in rust” fashion.

[8go]

matrix_commander/matrix-commander-tui is about 25 lines of code, with 1 line using fzf, Please provide a PR if important to you. Thank you in advance