add documentation on adding custom metadata

docs/_sidebar.md

@@ -2,6 +2,7 @@
   * [Getting started](/)
   * [CLI](cli.md)
   * [API](api.md)
+  * [Adding metadata](metadata.md)
   * [About](about.md)
 - Packages
   * [Highlights](packages.md)

docs/api.md

@@ -1,8 +1,8 @@
-?> This documentation page is for developers. Skip to the next page: [About](about.md).
+?> This documentation page is for developers. Skip to the next page: [Adding metadata](metadata.md).
 
 [sc4pac-tools-api](https://raw.githubusercontent.com/memo33/sc4pac-tools/main/api.md ':include')
 
 <!-- [sc4pac-tools-api](sc4pac-tools-api.md ':include') -->
 
 ---
-Next up: [About](about.md)
+Next up: [Adding metadata](metadata.md)

docs/hogwarts-castle.yaml

@@ -0,0 +1,35 @@
+group: "dumbledore"
+name: "hogwarts-castle"
+version: "1.0"
+subfolder: "620-education"
+dependencies:
+- "hagrid:whomping-willow"
+- "lupin:shrieking-shack"
+- "madam-hooch:brooms-and-quidditch-equipment"
+assets:
+- assetId: "dumbledore-hogwarts-castle"
+  include:
+  - "/Astronomy Tower.SC4Model"
+  - "/Boathouse.SC4Lot"
+  - "/Castle.dat"
+
+info:
+  summary: School of Witchcraft and Wizardry
+  warning: The castle is invisible to Muggles.
+  conflicts: Incompatible with Saruman's Isengard Tower
+  description: >
+    The school is located in the Scottish Highlands.
+
+    It was founded more than 1000 years ago.
+
+    It has a capacity of 900 students who are divided into four houses.
+  author: "Albus Dumbledore"
+  images:
+  - "https://upload.wikimedia.org/wikipedia/commons/thumb/4/4d/Studio_model_of_Hogwarts_at_Leavesden_Studios.jpg/1024px-Studio_model_of_Hogwarts_at_Leavesden_Studios.jpg"
+  website: "https://en.wikipedia.org/wiki/Hogwarts"
+
+---
+assetId: "dumbledore-hogwarts-castle"
+url: "https://community.simtropolis.com/files/file/25137-hogwarts-castle/?do=download"
+version: "1.0"
+lastModified: "1998-07-29T21:33:57Z"