feat(ui-cli): short hash prefix matching, human output formatters, embedded agent...

feat(ui-cli): short hash prefix matching, human output formatters, embedded agent skill

Short hash resolution:
- Resolve hash ID prefixes via station list lookup before command execution
- Skip resolution when all IDs are full-length (>= 48 chars, SHA-384)
- Clear error messages for ambiguous or unknown prefixes
- Silent mode suppresses spinner during internal resolution call

Human output formatters:
- Borderless table renderers for station list, template list, simulator state, performance stats
- Shared format utils: truncateId, statusIcon, wsIcon, fuzzyTime, countConnectors
- Truncate hash IDs in all human output tables (station list + success/failure)
- Type guards with Array.isArray + null checks for safe payload dispatch
- Handle supervisionUrls as string | string[], optional configuration
- Dynamic status capitalization, shared captureStream test helper
- 70 new tests (format + renderers), using canonical ChargingStationData type

Embedded agent skill:
- `skill show` prints embedded SKILL.md to stdout
- `skill install [--global] [--force]` writes to .agents/skills/
- SKILL.md embedded at build time via esbuild define
- Follows AgentSkills.io open standard

CLI option rename:
- Global --url renamed to --server-url (explicit intent)
- supervision set-url --url renamed to --supervision-url (no collision)

README restructured with prefix matching docs, output modes table,
station delete options, grouped simulator vs local commands