Add TOML reference docs for all world data types

- world/MANIFEST.md: manifest.toml and directory layout
- world/races/RACES.md: race schema (stats, body, natural, resistances, etc.)
- world/classes/CLASSES.md: class schema (base_stats, growth, hidden, guild)
- world/guilds/GUILDS.md: guild schema and [growth]
- world/spells/SPELLS.md: spell schema and types
- world/town/REGION.md: region.toml
- world/town/rooms/ROOMS.md: room schema and exits
- world/town/npcs/NPCS.md: NPC schema, race/class resolution
- world/town/objects/OBJECTS.md: object schema and [stats]

Made-with: Cursor

world/town/REGION.md

@@ -0,0 +1,28 @@
+# Region TOML Reference
+
+Each region is a directory under `world/` (e.g. `world/town/`) containing a `region.toml` file. The directory name is the region ID (e.g. `town`). Room, NPC, and object IDs in this region are prefixed with `"<region>:"` (e.g. `town:tavern`).
+
+## Fields
+
+| Field | Type | Required | Description |
+|-------|------|----------|-------------|
+| `name` | string | Yes | Display name of the region (e.g. for logs or future use). |
+
+Additional keys (e.g. `description`) may be present in the file; only `name` is required by the loader.
+
+## Example
+
+```toml
+name = "Thornwall"
+description = "A fortified trading town at the crossroads of the known world."
+```
+
+## Region contents
+
+Place TOML files in these subdirectories of the region folder:
+
+- `rooms/*.toml` — room definitions (see `rooms/ROOMS.md`)
+- `npcs/*.toml` — NPC definitions (see `npcs/NPCS.md`)
+- `objects/*.toml` — object definitions (see `objects/OBJECTS.md`)
+
+The server loads all regions whose folder contains a `region.toml` file.