Add mod documentation in seven languages

manifest.json

@@ -1,9 +1,9 @@
 {
   "id": "turn_battle_base",
-  "name": "Turn-based battle engine",
+  "name": "Turn Battle Base",
   "version": "2.0.0",
   "author": "ct",
-  "description": "Turn-based battle platform: battle ruleset contracts, core registry, action executors, status effects, battle scene, victory/defeat screens, EXP and loot reports",
+  "description": "The platform under every turn-based battle: starting from a scenario, the battle scene, victory and defeat, experience and loot — how the player fights is a separate battle system.",
   "category": "engine, gameplay",
   "sources": [
     "src/**/*.cs"