Add the possibility to specify plugin set to
be used as overridable `thunar` derivation argument.
New nixos config attribute:
`services.xserver.desktopManager.xfce.thunarPlugins`
that allows user to specify plugins in the context
of nixos.
Tests:
- With and without plugins.
- Using the nixos attributes.
A `thunar` plugin that adds archive manipulation features to
right click on file/directory menu. It can use either gnome or
kde archive managers. Detection of backend based on
`*.desktop` files mime types.
Should supercede non-functional pre-existing
`xfce.thunar_archive_plugin` (which for some
unknown reason is building the volume manager
plugin).
Also removed `xfce.thunar_archive_plugin` because
superceded.
Tests:
- When plugin package is installed, the supplementary
menu entries appear in thunar.
- Succesfully extracted an archive using backend
`file-roller` through thunar menu entry.
+ minor changes from vcunat, mainly meta.
