Add mod documentation in seven languages

docs/en.md

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+# Cthangover: Starter Party — who the player begins with
+
+This small mod gives a new game of Cthangover its starting state: Marao in the party and the skill Slave Trader in the skill collection. It holds only this code; the character and the skill themselves are data of the base game and of the skills engine.
+
+## What a new player has
+
+The character panel at the very start of Cthangover — one party member, Marao, with two actions and a free slot:
+
+![The Character actions panel: Party 1, Marao (template 2, HP 16/16, AP 1, ATK 5, DEF 0) with Basic attack and Defence, and an empty third slot.](assets/party.jpg)
+
+The skills panel — one skill, Slave Trader:
+
+![The Skills panel: the collection holds one Epic passive skill, Slave Trader, "+10% recruitment chance", with the description "Gives the ability to enslave a defeated enemy with a base chance of 10%. The upkeep of the slave falls on your shoulders." and the collection effect +10% recruitment chance.](assets/skills.jpg)
+
+Slave Trader is what lets the player capture defeated enemies (see Recruiting): without it no enemy can join.
+
+## When it runs
+
+- When the game's mods are ready, the mod adds the character `Marao` to the party and grants the skill `slave_master`.
+- Every time a **new game** starts it does the same again, because a new game first clears the party.
+- Loading a save replaces the party and skills with the saved ones. Both steps can run more than once safely: Marao is not added twice and the skill is not granted twice.
+
+## Changing the start
+
+- Another mod can add more starting characters the same way: a C# initializer that adds its characters to the party when the mods are ready.
+- To start without Marao or without the skill, leave this mod out of the game's collection and seed the party in your own mod.
+
+## Known problems
+
+- The Slave Trader card has no picture: the skill's image is missing.
+- The card and its description promise "+10% recruitment chance", but no code reads that bonus; the capture roll uses only the enemy's own chance.