Add parsing for fields with known meanings

[andreondra]

For now, I will edit the protocol.json and add custom keys indicating that the field is parsable. However, better idea may be to identify these fields using names, which should be unique?

• [x] Battery state
• [x] Working mode
• [x] Battery communication status
• [x] Anti-backflow
• [ ] Grid codes
• [x] DC side battery types
• [x] Battery protocol
• [x] Meter protocol
• [x] Model code
• [x] Battery manufacturer
• [x] Battery error