docs(readme): add initial README

Signed-off-by: Jonas Dujava <jonas.dujava@gmail.com>

Author: jdujava

README.md

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+# `fmenu` and related scripts
+
+This is a collection of scripts using [`fzf`](https://github.com/junegunn/fzf).
+The main script is `fmenu` — fuzzy-selection dynamic menu — which can be used as a [`dmenu`](https://tools.suckless.org/dmenu/) replacement/enhancement.
+
+Other scripts include:
+- `fmenu_run` — run binaries/commands in `$PATH`
+- `vfzf` — open files in an `$EDITOR`
+- `zfzf` — open PDF/DjVu/PS files in `zathura`
+- `mfzf` — open manpage(s)
+- `fprompt` — simple binary ("No/Yes") prompt
+- `clipfmenu` — clipboard history menu
+- `passfmenu` — password manager menu
+- `fzfopen` — open files by the mime type
+- `fdict` — fuzzy-finder interface to dictionaries
+- `fzf-oneliner` — run one-liner shell scripts