refactor: update project

- add documentation CMake build script. re-organise document layout for future changes.
- move LIBCMO_EXPORT to BMap and rename it to BMAP_EXPORT because only BMap need to use this macro.
- fully refactor VTEncoding to make it more like Python
	- Now language name is platform independent.
	- Hide implementation detail as possible as I can.
	- Language mapping are still work in progress.
- add code gen for new added universal encoding feature to generate language name mapping in Windows and Iconv respectively.
- remove old code of CMake build script.
- update VTUtils for new requirement.
	- remove useless functions.
	- create LibCmo specific custom exception classes.

BMap/CMakeLists.txt

@@ -34,8 +34,12 @@ PROPERTIES
     CXX_STANDARD_REQUIRED 20
     CXX_EXTENSION OFF
 )
-# Order Unicode charset for private using
+# Setup project macros
 target_compile_definitions(BMap
+# Enable export macro
+PRIVATE
+	BMAP_EXPORTING
+# Order Unicode charset for private using
 PRIVATE
     $<$<CXX_COMPILER_ID:MSVC>:UNICODE>
     $<$<CXX_COMPILER_ID:MSVC>:_UNICODE>
@@ -51,69 +55,3 @@ install(TARGETS BMap
     CONFIGURATIONS Release
     RUNTIME DESTINATION ${YYCC_INSTALL_BIN_PATH}
 )
-
-
-# cmake_minimum_required(VERSION 3.12)
-# project(BMap LANGUAGES CXX)
-
-# # add libcmo if not existed
-# if (NOT TARGET LibCmo)
-# 	add_subdirectory("../LibCmo" "LibCmo.out")
-# endif ()
-# # add ironpad if not existed
-# if (NOT TARGET IronPad)
-# 	add_subdirectory("../IronPad" "IronPad.out")
-# endif ()
-
-# # hide all function in default
-# # fix imported library PIC issue (i don't know why. just make it works)
-# set_target_properties(LibCmo
-# PROPERTIES
-#     CXX_VISIBILITY_PRESET hidden
-#     POSITION_INDEPENDENT_CODE ON
-# )
-# set_target_properties(IronPad
-# PROPERTIES
-#     CXX_VISIBILITY_PRESET hidden
-#     POSITION_INDEPENDENT_CODE ON
-# )
-
-# # setup sources
-# set(bmap_headers ".")
-# set(bmap_sources
-# 	BMap.cpp
-#     BMExports.cpp
-# )
-
-# # generate shared library
-# add_library(BMap
-# SHARED
-#     ${bmap_sources}
-# )
-# target_link_libraries(BMap
-# PRIVATE
-# 	LibCmo
-# 	IronPad
-# )
-# target_include_directories(BMap
-# PRIVATE
-# 	${bmap_headers}
-# )
-
-# # set project standard
-# set_target_properties(BMap
-# PROPERTIES
-# 	CXX_STANDARD 20
-# 	CXX_STANDARD_REQUIRED 20
-# 	CXX_EXTENSION OFF
-# )
-# # set default visibility to hidden
-# set_target_properties(BMap
-# PROPERTIES
-#     CXX_VISIBILITY_PRESET hidden
-# )
-# # add export used macro flag
-# target_compile_definitions(BMap
-# PUBLIC
-# 	LIBCMO_EXPORTING
-# )