[Themes] Added new themes honeywell, spacecadet, 1976 and more

[briemens]

Added the following themes:

• honeywell inspired by GMK Honeywell by Living Speedbump

• spacecadet inspired by SA Space Cadet by 7bit

• 1976 inspired by SA 1976 by Engicoder

• godspeed inspired by SA Godspeed by Mito

• leviathan inspired by SA Leviathan by OneCreativeMind

• kobayashi inspired by SA Kobayashi by Madēo

[briano1905]

Sorry for the late merge! These themes are fantastic. Thanks for contributing :)