Added

• Faction merge (/f merge send <faction>, /f merge accept <faction>):
  • Officers and above can send a merge request proposing their faction be absorbed by another.
  • Officers and above of the target faction can accept the request to complete the merge.
  • On acceptance, all claims, warps, bank balance, and members are transferred to the target faction; members join at the target's default rank; the sender faction is disbanded.
  • Online members of the target faction are notified when a merge request arrives.
  • New permission factions.cmd.merge (default: true).
  • New MergeRequestModel / MergeRequestRepository data layer and MergeService / MergeServiceImpl service layer.
  • New audit actions merge-request and merge-accept for the audit log.
• Internationalization support with locale bundles under messages/ for en, es, de, fr, pt-BR, ja, zh, and ru.
• New player language command: /f language [code|reset] with aliases lang and locale.
• New player profile locale persistence (players.locale) for per-player language overrides.
• New config key: factions.language.default for server-wide default locale fallback.
• New permission node: factions.cmd.language (default true).
• New translator/contributor documentation: docs/i18n.md.

Changed

• Upgraded TeamsAPI integration to 2.0.0:
  • getRelation(id, id) now returns TeamRelation.MEMBER when both team UUIDs are equal (new TeamsAPI 2.0.0 contract).
• Message resolution now follows locale fallback order: player locale -> server default -> English -> inline fallback text.
• /f help now includes the language command.
• /fa reload now reloads locale bundles in messages/ in addition to config.