Move code from include/ to src/

I don't like to keep separate folders for public & private stuff. In my opinion this is "old"
approach. I like when header and module file are next to each other.

My choice. Installation will handle splitting public & private headers.

lib/CMakeLists.txt

@@ -44,26 +44,25 @@ add_library(EventBus
 	src/eventbus/AsyncEventBus.cpp include/eventbus/AsyncEventBus.h
 
 	# New version of EventBus 3.0
-	include/dexode/EventBus.hpp
-	include/dexode/eventbus/Listener.hpp
-	src/dexode/eventbus/strategy/Protected.cpp include/dexode/eventbus/strategy/Protected.hpp
-	include/dexode/eventbus/strategy/Transaction.hpp
+	src/dexode/EventBus.hpp
+	src/dexode/eventbus/Listener.hpp
+	src/dexode/eventbus/strategy/Protected.cpp src/dexode/eventbus/strategy/Protected.hpp
+	src/dexode/eventbus/strategy/Transaction.hpp
 	)
 add_library(Dexode::EventBus ALIAS EventBus)
 
 target_compile_features(EventBus PUBLIC cxx_std_17)
 
 target_include_directories(EventBus PUBLIC
-	$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include/>
+	$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src/>
 	$<INSTALL_INTERFACE:include/>
-	PRIVATE lib/src/
 	)
 
 set(EventBus_PUBLIC_HEADERS
-	include/dexode/EventBus.hpp
-	include/dexode/eventbus/Listener.hpp
-	include/dexode/eventbus/strategy/Protected.hpp
-	include/dexode/eventbus/strategy/Transaction.hpp
+	src/dexode/EventBus.hpp
+	src/dexode/eventbus/Listener.hpp
+	src/dexode/eventbus/strategy/Protected.hpp
+	src/dexode/eventbus/strategy/Transaction.hpp
 	)
 # Add definitions for targets
 # Values: