Draft: Refactoring Command.java and relatives

Description

Split Command.java into Command DAO and command execution task Close MR !129 (merged) & !130 (closed) before

Issue(s)

Closes #360

Test environment

Test procedures

Check for no regression:

• script execution
• Device detection

Technical details

Screenshots

Check list

• Self review
• Test procedure explained
• Tested on fresh install
• Tested applied as an update
• License
• Internal documentation
• User documentation