Improves sql-agent-cli help discoverability for agents and humans.
Highlights:
- Makes the default happy path explicit:
sql-agent-cli "SELECT ..." - Clarifies that the configured default target is used automatically
- Steers agents away from unnecessary config/environment discovery before first query attempt
- Reorganizes help output into clearer sections for target selection, query input, auth, and guardrails
- Improves
configandtargetshelp text to better frame them as admin/inspection commands - Updates docs to match the new guidance