General code and comment improvements.
Also, removed the :desc's for csv-mode because map! is currently unable
to set which-key descriptions mode-locally, and should be avoided for
anything but global keybinds. This will be fixed when General is
introduced into Doom.
Now that we are loading package autoloads files (as part of the
generated doom-package-autoload-file when running make autoloads), many
:commands properties are redundant. In fact, many def-package! blocks
are redundant.
In some cases, we can do without a config.el file entirely, and can move
into the autoloads file or rely entirely on package autoloads.
Also, many settings have been moved in their module's autoloads files,
which makes them available ASAP; their use no longer depends on module
load order.
This gained me a modest ~10% boost in startup speed.
