0.2.1

[v0.2.1] – Guilds, Treasury & Hexarchate Panel

Added fully persistent Guilds as first-class entities:
- Unique guild ID, name, leader, members and 5 ranks: Leader / Officer / Veteran / Member / Recruit.
- Each guild has its own Treasury account in the economy system.
Core guild commands:
- /guild create <name> – found a new guild (one guild per player).
- /guild invite <player> / /guild accept / /guild deny – invite-based join flow.
- /guild leave – members can leave; leaders must transfer or disband.
- /guild kick <player> – Leader and Officers can remove lower-rank members.
- /guild promote <player> / /guild demote <player> – rank management within the 5-step ladder.
Guild settings & flavour:
- /guild setmotd <text> – set a guild description / MOTD.
- /guild setopen <true|false> – prepare for future open-join behaviour.
- /guild setmax <number> – optional member cap (stored now, enforced later).
- /guild settitle <leader|officer|veteran|member|recruit> <title> – per-guild custom rank titles (e.g. “Archon”, “First Blade”, etc.).

Every guild now has a dedicated SYSTEM Treasury account created at guild creation.
Economy-backed commands:
- /guild balance – shows the guild Treasury balance (Gold / Silver / Copper).
- /guild deposit <G> <S> <C> – transfer from your personal account into the guild Treasury.
- /guild withdraw <G> <S> <C> – Leader-only withdrawal from Treasury back to their personal account.
All guild money flows use the existing Phase 1 economy backend (EconomyStore, EconomyService, TransactionType).

The Vox Imperion council seat (or server ops) gains admin-side guild controls:
- /vox guild info <name> – inspect any guild: leader, member breakdown, and Treasury balance.
- /vox guild setleader <guild> <player> – force-transfer guild leadership.
- /vox guild disband <guild> – forcibly disband a guild; remaining funds are redirected to the Council Treasury.
- /vox guild rename <guild> <newName> – emergency rename for trolling / violations.
Vox commands are bound to the Vox Imperion seat via the existing council permission system (plus fallback for ops).

The in-game Hexarchate Panel (opened with the G key) now has two tabs:
- Ledger – existing player economy overview.
- Guild – new tab for guild status.
Guild tab displays:
- Guild name and your custom rank title.
- Leader name (resolved from UUID when possible).
- Member counts by rank: total members + Officers / Veterans / Members / Recruits.
- Guild Treasury balance formatted as G/S/C.
- Pending invite count if you are not yet in a guild.
Guild tab actions:
- Deposit – opens chat prefilled with /guild deposit to send funds to the Treasury.
- Leave Guild – sends /guild leave for quick exit.
- Invites – shows Invites (X) when you have pending invites and opens chat with /guild accept.

Added guild snapshot networking for the UI:
- GuildSnapshotRequestC2SPayload (client → server) requests a fresh guild snapshot.
- GuildSnapshotS2CPayload (server → client) sends a compact summary of the player’s guild + Treasury.
- GuildNetworking (server) and GuildClientNetworking + ClientGuildState (client) mirror the existing economy snapshot pattern.
GuildStore is loaded on server start and saved on clean shutdown alongside EconomyStore, ensuring guilds and their treasuries persist between restarts.
Ensured a player can effectively be in only one guild at a time; helper logic keeps membership maps and the player→guild mapping consistent, even under Vox overrides.

No weekly dues, taxes, or faction politics yet – this release is focused on solid foundations:
- guild identity + ranks,
- shared money via Treasury,
- clean admin controls (Vox Imperion),
- and a first UI surface for players.
Open-join behaviour (openJoin) and more advanced guild management / Vox-only UI hooks are reserved for future milestones.