Inclusion of mate-netbook in the repository

Summary:
Initial version of mate-netbook, fixes T6162.

Signed-off-by: Pierre-Yves <pyu@riseup.net>

Test Plan:

• install package
• enable "Undecorate maximized" windows in MATE Tweak
• execute mate-maximus in a terminal
• launch pluma (maximized), decorations are gone.

Reviewers: Triage Team, DataDrake

Reviewed By: Triage Team, DataDrake

Subscribers: DataDrake

Maniphest Tasks: T6162

Differential Revision: https://dev.solus-project.com/D3415