Add mod load order

[Caliel666]

you can change mod load order with the parameter priority = on DML's config.toml

ex:

priority = ["High Refresh Rate", "DivaBackup", "Disable Watermarks"]
highest < lowest

on the GUI this could be achieved by drag and drop and/or right clicking the numbers on the left side and editing the number
on TUI it could be done by adding a edit mode when managing mods and use arrows up and down or something like that to change a mod position

video example on how DMM does it:

[Brod8362]

Thanks for the video and idea, didn't know this was even an option.

Probably not going to happen in 0.3.0, but maybe expect this around 0.3.1/0.3.2.

[Brod8362]

Tentatively planning for 0.3.3

[Brod8362]

Added in v0.3.3.