The docs incorrectly showed aliases as 'hermes-work' when the actual
implementation creates 'work' (profile name directly, no prefix).
Rewrote the user guide to lead with the alias pattern:
hermes profile create coder → coder chat, coder setup, etc.
Also clarified that the banner shows 'Profile: coder' and the prompt
shows 'coder ❯' when a non-default profile is active.
Fixed alias paths in command reference (hermes-work → work).