Redesign API commands as top-level resource commands with subcommands

Replace `cronitor api <resource>` with `cronitor <resource> <action>`:

  cronitor monitor list
  cronitor monitor get <key>
  cronitor monitor create --data '{...}'
  cronitor monitor update <key> --data '{...}'
  cronitor monitor delete <key>
  cronitor monitor pause <key>
  cronitor monitor unpause <key>

Same pattern for: statuspage, issue, notification, environment

Features:
- Beautiful table output using lipgloss styling
- Colored status indicators (passing/failing/paused)
- Consistent --format, --output, --page flags
- Aliases: `env` for environment, `notifications` for notification

https://claude.ai/code/session_01UDueW9A6SuxugCcsbAMfdB

Author: claude