feat: add group property to connection configurations}
- Add "group" field to all connection entries in .p3xrs-conns-example.json with values: Local, Production, TLS, VPN, Cluster & Sentinel, SSH - Add "group" field to all connection entries in .p3xrs-conns.json with values: Production, TLS, Cluster & Sentinel - Enables grouping/categorizing Redis connections in the UI