Fix #418, reorganize header files and restructure messages

Move the header files to a "config" directory as documented in the CFE
guidelines, which allows easier override.

Organize the content to adhere to the patterns.

Specifically - adds a dedicated structure type for each cmd, and also
puts the payload into a separate sub-structure.

Command handlers and tests updated accordingly (many of which were simplified).

arch_build.cmake

@@ -0,0 +1,39 @@
+###########################################################
+#
+# CF App platform build setup
+#
+# This file is evaluated as part of the "prepare" stage
+# and can be used to set up prerequisites for the build,
+# such as generating header files
+#
+###########################################################
+
+# The list of header files that control the CF configuration
+set(CF_PLATFORM_CONFIG_FILE_LIST
+  cf_internal_cfg.h
+  cf_msgids.h
+  cf_platform_cfg.h
+)
+
+if (CFE_EDS_ENABLED_BUILD)
+
+  # In an EDS-based build, msgids come generated from the EDS tool
+  set(CF_CFGFILE_SRC_cf_msgids "${CMAKE_CURRENT_LIST_DIR}/config/cf_eds_msg_topicids.h")
+
+endif(CFE_EDS_ENABLED_BUILD)
+
+# Create wrappers around the all the config header files
+# This makes them individually overridable by the missions, without modifying
+# the distribution default copies
+foreach(CF_CFGFILE ${CF_PLATFORM_CONFIG_FILE_LIST})
+  get_filename_component(CFGKEY "${CF_CFGFILE}" NAME_WE)
+  if (DEFINED CF_CFGFILE_SRC_${CFGKEY})
+    set(DEFAULT_SOURCE "${CF_CFGFILE_SRC_${CFGKEY}}")
+  else()
+    set(DEFAULT_SOURCE "${CMAKE_CURRENT_LIST_DIR}/config/default_${CF_CFGFILE}")
+  endif()
+  generate_config_includefile(
+    FILE_NAME           "${CF_CFGFILE}"
+    FALLBACK_FILE       ${DEFAULT_SOURCE}
+  )
+endforeach()

fsw/inc/cf_extern_typedefs.h → config/default_cf_extern_typedefs.h

@@ -26,7 +26,7 @@
 #ifndef CF_EXTERN_TYPEDEFS_H
 #define CF_EXTERN_TYPEDEFS_H
 
-#include <cf_platform_cfg.h>
+#include "cf_platform_cfg.h"
 
 /**
  * @brief Values for CFDP file transfer class