- reduce 4 spaces between help columns as it's too wide for handhelds
- support `]` as prompt in nav-as-you-type-mode when filter is empty
- update plugin docs

This plugin is an alternative to the native batch rename interface in
nnn. qmv from renameutils and vidir from moreutils allow to rename
files without fear of replacing existing files.

1. getplugs should work even if nnn is not run
2. Remove redundant ./ prefix
3. Update plugin docs

* Implement plugins control of nnn + plugins

* Refactor plugins control code and fix getplugs to recognize hidden files

* Fix bug when going to dir on non-current context from plugin

* Fix some plugins to work on openbsd and freebsd

* Renamings

* Switch to -R flag in cp instead of -r; BSDs complain

* Change braces of function location

* Rewrite plugin creation in README and add new plugins to the table

* Update the fzcd script to include fzy or fzf

* Change plugin name resolve-link-dir -> lncd

* Fixing plugins README table

* Remove some cd plugins but add them as examples to plugins README

* Added 2 plugins for drag and drop support

These scripts uses https://github.com/mwh/dragon
and curl.

It allows nnn to drag and drop files either to other programs, or to
itself.

* added link to dependency and spelling

* added drag/drop-file scripts to readme table