rc_8.4-v8.4.0-0-buster

What's Changed

• [CES-3045] Add New GCode flavor by Frederic Meeuwissen (@Frederic98) in #50
• [SEM-526] Add github workflow by Frederic Meeuwissen (@Frederic98) in #51

Full Changelog: 4.10.1...rc_8.4-v8.4.0-0-buster