Previously, it was not possible to set an arbitrary tmux prefix since
CTRL was hardcoded in the module.
To avoid breaking existing configs, a new option was implemented that
conveniently uses the tmux terminology but defaults to null and does
not affect previous behavior when set to null.
The behavior for the shortcut option was not completely replicated,
i.e., it does not bind "b" to send-prefix but stick to the default of
the prefix binding sending prefix (C-b C-b instead of C-b b) and it
does not bind repetition of the prefix (C-b C-b) to `last-window`,
both of these bring the option closer to the default tmux
configuration.
Fixes#1237
This commit adds the tmux program to Home Manager.
In addition to configuring tmux, a user may specify tmux plugins from
Nixpkgs. These can be included in the list of `plugins` and can either
be a package (all tmux plugins live under `nixpkgs.tmuxPlugins.*`), or
an object which includes the plugin and an `extraConfig`, which will
be run immediately after sourcing the tmux plugin.
Finally, this commit introduces two nested programs which may be
enabled which depend on tmux: tmuxp and tmuxinator. These do not have
the ability to be configured, although this may be a future
contribution.
