feat: custom systems examples added

docs/CMakeLists.txt

@@ -88,6 +88,7 @@ add_custom_command(OUTPUT "${SPHINX_INDEX_FILE}"
                        "${CMAKE_CURRENT_SOURCE_DIR}/examples/capacitor_time_curve.rst"
                        "${CMAKE_CURRENT_SOURCE_DIR}/examples/clcpp_response.rst"
                        "${CMAKE_CURRENT_SOURCE_DIR}/examples/conversion_factor.rst"
+                       "${CMAKE_CURRENT_SOURCE_DIR}/examples/custom_systems.rst"
                        "${CMAKE_CURRENT_SOURCE_DIR}/examples/foot_pound_second.rst"
                        "${CMAKE_CURRENT_SOURCE_DIR}/examples/glide_computer.rst"
                        "${CMAKE_CURRENT_SOURCE_DIR}/examples/hello_units.rst"

docs/examples.rst

@@ -11,6 +11,7 @@ Examples
     examples/measurement
     examples/linear_algebra
     examples/foot_pound_second
+    examples/custom_systems
     examples/glide_computer
 
     examples/capacitor_time_curve

docs/examples/custom_systems.rst

@@ -0,0 +1,7 @@
+custom_systems
+==============
+
+.. literalinclude:: ../../example/custom_systems.cpp
+  :caption: custom_systems.cpp
+  :start-at: #include
+  :linenos: