mie: add value type hierarchy definitions

every construct within Mie, such as constants, instructions, functions, and translation units, are sub-types of the generic mie_value struct.

mie_value will facilitate iterating through the IR, as well as converting the IR to/from different formats.

mie/CMakeLists.txt

@@ -0,0 +1,15 @@
+file(GLOB_RECURSE mie_sources *.c *.h include/mie/*.h)
+
+if (WIN32)
+	set(rc_file ${CMAKE_CURRENT_SOURCE_DIR}/../res/win32/mie.rc)
+endif ()
+
+if (IVY_STATIC)
+	add_library(mie STATIC ${mie_sources} ${rc_file})
+else ()
+	add_library(mie SHARED ${mie_sources} ${rc_file})
+endif ()
+
+target_include_directories(mie PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include/)
+target_link_libraries(mie Bluelib::Core Bluelib::Object)
+target_compile_definitions(mie PRIVATE MIE_EXPORT=1 MIE_STATIC=${IVY_STATIC})