feat: add FactionsX data importer

[derrickmehaffy]

Summary

• Adds a complete data importer for migrating servers from FactionsX (by Humblegod666, v1.0.533) to HyperFactions
• 8 Gson-mapped data model records matching FactionsX on-disk JSON format (config/factions/, config/players/, Claims.json, Zones.json)
• Full FactionsXImporter with validate/importFrom following the same pattern as HyFactionsImporter and ElbaphFactionsImporter
• Admin command: /f admin import factionsx [path] [flags] with --dry-run, --overwrite, --no-zones, --no-power
• Cross-importer lock safety added across all three importers to prevent concurrent imports

Key implementation details

• Per-player power from individual player files (not even-split like HyFactions)
• Owner is NOT in the Members map — added as LEADER implicitly
• RECRUIT role mapped to MEMBER with warning (no HyperFactions equivalent)
• Per-role permissions (Build/Claim/Interact/Invite/Kick) mapped to territory flags
• Zone chunks parsed from "chunkX:chunkZ" strings, clustered via BFS
• ChunkY=Z naming quirk handled (same as HyFactions)
• Data root confirmed as config/ via decompiled FileUtils.java

Test plan

• Place sample FactionsX data in mods/FactionsX/config/
• Run /f admin import factionsx --dry-run — validates without changes
• Run /f admin import factionsx — imports successfully
• Verify imported factions in /f list, claims on map, zones working
• Test --overwrite flag with existing factions
• Test cross-importer lock (start two imports simultaneously)

🤖 Generated with Claude Code