docs: fix inconsistent command help and config defaults (P3 Group F)
Implemented P3 issues #28 and #29:
**#28: Fix Inconsistent Command Help**
- Updated SSH welcome message in ssh/server.go
- Added missing 'activate <file>' and 'deactivate <file>' commands
- Now shows all 7 commands: ls, cat, rm, activate, deactivate, run, logs
- Welcome message now matches actual available commands
**#29: Align Config Defaults**
- Updated README.md line 89 to show correct 'inline' default: false
- Was incorrectly documented as 'true'
- Now matches actual code behavior in config/parse.go:27
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Assisted-by: Copilot: Claude Sonnet 4.5 via Crush <crush@charm.land>