[TD-10430] move main.c outof dnode module

source/server/CMakeLists.txt

 add_subdirectory(mnode)
 add_subdirectory(vnode)
 add_subdirectory(qnode)
+add_subdirectory(dnode)
 
-aux_source_directory(dnode TAOSD_SRC)
+aux_source_directory(. TAOSD_SRC)
 add_executable(taosd ${TAOSD_SRC})
 target_link_libraries(
     taosd

source/server/dnode/CMakeLists.txt

+aux_source_directory(src DNODE_SRC)
+add_library(dnode ${DNODE_SRC})
+target_include_directories(
+    dnode
+    PUBLIC "${CMAKE_SOURCE_DIR}/include/server/dnode"
+    private "${CMAKE_CURRENT_SOURCE_DIR}/inc"
+)
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