fzf wrappers

• fzf wrappers written in C:
  • fzf_changedir.c pipes output of fd into fzf to search for directories and can eg. be used with cd.
  • fzf_fif.c pipes output of rg into fzf to search for keywords in files recursively and extract file and line number of search result; then runs nvim <file> <linenumber>. Can be modified to suit other editors.

Requirements

• fzf_changedir: fzf, fd, exa
• fzf_fif: fzf, bat, ripgrep

TODO: the programs should ideally fallback to compile with using find, ls, cat, and grep instead, if any of the above do not exist (except for fzf, which will always be a hard requirement).