✨ Internal train network structure

- Defines Network, StopArea, StopPoints and JourneySections
- Loads them from json using the build_from_json method

CMakeLists.txt

@@ -2,6 +2,17 @@ cmake_minimum_required(VERSION 4.0)
 
 project(Trenesis)
 
+# Dependencies
+add_subdirectory(ext/json)
+
 include_directories(lib)
+add_library(trenesis)
+
+target_sources(trenesis
+	PRIVATE
+	lib/trenesis/geojson.cpp
+	lib/trenesis/network/graph.cpp
+)
+target_link_libraries(trenesis PUBLIC nlohmann_json::nlohmann_json)
 
 add_subdirectory(tests)