v.21.7Improvement

Update ClickHouse Client to Display Reconnect Message

Update prompt in clickhouse-client and display a message when reconnecting. This closes #10577. #25281 (alexey-milovidov).
Enhance clickhouse-client by updating the prompt and adding a reconnecting message display.

Why it matters

Improve user experience in clickhouse-client by providing clearer visual cues when the client reconnects to the server, helping users to be aware of connection status changes and avoid confusion during connection disruptions.

How to use it

Use the updated clickhouse-client as before; the new prompt and reconnecting messages are enabled by default with no additional configuration needed.