Complete KMAC functionality

[jwnrt]

• sideloading
• masking

[loiclefort]

Sideloading will be available soon as part of my work on Darjeeling Key Manager DPE.

[jwnrt]

I think we have sideloading for Darjeeling and Earlgrey now, is that right @AlexJones0?

[AlexJones0]

Darjeeling has had sideloading added, Earlgrey still needs Keymgr support (hopefully coming soon!)

[jwnrt]

Earlgrey now has sideloading, we're only missing masking