[GRC] Guild Raid Calendar

# Raid Calendar

A lightweight, guild-focused raid calendar for WoW Classic Era. Schedule 20-man and 40-man raids, sync them automatically across your guild, and let members sign up with a click — no external website or Discord bot required.

## Features
- **Calendar view (`/raid`)** — browse any month, see at a glance which days have raids scheduled, and click a day to see the details.
- **Raid creation (`/rc`)** — restricted to guild leadership and officers. Pick a raid size (20-man or 40-man), then choose the specific raid from a dropdown (Zul'Gurub, Ruins of Ahn'Qiraj, Molten Core, Blackwing Lair, Temple of Ahn'Qiraj, Naxxramas, Onyxia's Lair), set a date, time, and an optional note.
- **Automatic guild sync** — new raids and edits are broadcast to every online guild member running the addon, and a sync is requested automatically on login. A manual "Sync with guild" button is also available.
- **Chat announcement** — creating a raid automatically posts a message in guild chat announcing the raid, date and time.
- **Signups** — members can mark themselves Accepted, Tentative, or Declined for any raid with one click. Click a raid entry to open a full roster overview split into three tabs.
- **Bilingual UI** — switch between German and English anytime via the gear icon in the calendar window.
- **Permission-aware deletion** — only the raid's creator or an officer/guild master can remove it, and deletions sync to everyone.

## Commands
- `/rc` — open or close the calendar
- `/raid sync` — manually request the latest data from your guild
- `/raid lang de` or `/raid lang en` — switch language

## Notes
- Sync happens through in-game guild addon messages, so at least one other guild member needs the addon installed and online for data to spread.
- Works fully offline/solo as well — without a guild, anyone can create raids and the calendar simply won't sync anywhere.