Pcb improvements

1. Implement on board DCDC converter 2. Run on 3.3V, GPS supports this 3. Replace thermistor with SMD one 4. Change cable connectors to JST 5. Rearrange tracks to help WiFi antenna clearance <img width="630" height="543" alt="image" src="https://github.com/user-attachments/assets/38a72cf1-646a-4236-8ed1-ff05f557ec7e" /> <img width="675" height="569" alt="image" src="https://github.com/user-attachments/assets/f75ae908-c812-4775-90c3-436aa52b112f" /> Can you verify proper fit to case? Had to move things around a bit