docs: Add missing theme-library type in path mappings

Author: matz3

internal/documentation/docs/pages/Configuration.md

@@ -130,7 +130,7 @@ resources:
       webapp: webapp
 ```
 
-#### Libraries and Components
+#### Libraries, Theme Libraries, and Components
 - `src`: Mapped to runtime path `/resources`
 - `test`: Mapped to runtime path `/test-resources`