Provide a portable fallback for fzf

`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).

Look for where fzf is used in the codebase, likely in shell scripts or Python subprocess calls for interactive selection. Identify the specific commands and see how to integrate a fallback like sentaku or rofi. Test the changes on a system without fzf to ensure the fallback works correctly.

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