Add Phase 3 advanced commands

[robzolkos]

Summary

• Implements all Phase 3 commands from CLI-PLAN.md
• Adds comment, reaction, step, and notification command groups
• Adds card action commands (close, reopen, postpone, column, assign, tag, watch)
• Full test coverage with 96 tests, 188 assertions

New Commands

Comment commands

fizzy comment list --card <number>
fizzy comment show <id> --card <number>
fizzy comment create --card <number> --body <text>
fizzy comment update <id> --card <number> --body <text>
fizzy comment delete <id> --card <number>

Reaction commands

fizzy reaction list --card <number> --comment <id>
fizzy reaction create --card <number> --comment <id> --content <emoji>
fizzy reaction delete <id> --card <number> --comment <id>

Step commands (to-do items)

fizzy step show <id> --card <number>
fizzy step create --card <number> --content <text> [--completed]
fizzy step update <id> --card <number> [--content <text>] [--completed|--not-completed]
fizzy step delete <id> --card <number>

Notification commands

fizzy notification list [--page <n>] [--all]
fizzy notification read <id>
fizzy notification unread <id>
fizzy notification read-all

Card action commands

fizzy card close <number>
fizzy card reopen <number>
fizzy card postpone <number>
fizzy card column <number> --column <id>
fizzy card untriage <number>
fizzy card assign <number> --user <id>
fizzy card tag <number> --tag <title>
fizzy card watch <number>
fizzy card unwatch <number>

Test plan

• All 96 tests pass
• Verified against live Fizzy API:
  • fizzy card tag works correctly (uses tag_title param)
  • fizzy card assign works correctly (uses assignee_id param)
  • fizzy card watch works correctly
  • fizzy comment create/list works correctly
  • fizzy reaction create/list works correctly