Add MIT license
MIT is a pretty common license. OSI classifies it as popular, and according to Whitesource/Mend.io, it was used in 26% of 2021's software, while GPL only had 10%. A lot of packages in the AUR and [extra], such as Forgejo and Fluxbox, use it. It's also kinda similar to Apache. Therefore, I think the MIT license should be included in the bundled ones.