Summary of changes

• Split public and private headers
  
• Improve API docs
  
• Use GSourceOnceFunc for _once functions
  This is a slight API break.
  
• Install shared library with .0 soname
  
• Make JSON files compatible with recent json-glib
  
• Added devices:
  
  • Xiaomi Mi A2 Lite
    
• Issues fixed:
  
  • https://gitlab.gnome.org/World/Phosh/gmobile/-/issues/4
    
• Contributors:
  
  • Andrea Bolognani
    
  • Guido Günther