Add documentation for Province, Resource Node Data, Terrain Data, and Throne City

- Created a new document for Province detailing its characteristics and improvements.
- Added Resource Node Data documentation, including resource types, effects, and raw data tables.
- Introduced Terrain Data documentation, outlining terrain types, effects, and improvements available.
- Documented Throne City, highlighting its unique feature of providing extra gold income.

docs/Load Game Data Into Build Calculator.md

@@ -0,0 +1,5 @@
+---
+type: Task
+status: TODO
+---
+Seems like a lofty goal. Need to parse the serialized game file. Maybe easy? Do research.