msg ROS2 compatibility, microdds_client improvements (timesync, reduced code size, added topics, etc), fastrtps purge

- update all msgs to be directly compatible with ROS2
 - microdds_client improvements
   - timesync
   - reduced code size
   - add to most default builds if we can afford it
   - lots of other little changes
 - purge fastrtps (I tried to save this multiple times, but kept hitting roadblocks)

msg/LoggerStatus.msg

@@ -0,0 +1,21 @@
+uint64 timestamp               # time since system start (microseconds)
+
+uint8 LOGGER_TYPE_FULL    = 0  # Normal, full size log
+uint8 LOGGER_TYPE_MISSION = 1  # reduced mission log (e.g. for geotagging)
+uint8 type
+
+uint8 BACKEND_FILE    = 1
+uint8 BACKEND_MAVLINK = 2
+uint8 BACKEND_ALL     = 3
+uint8 backend
+
+float32 total_written_kb       # total written to log in kiloBytes
+float32 write_rate_kb_s        # write rate in kiloBytes/s
+
+uint32 dropouts                # number of failed buffer writes due to buffer overflow
+uint32 message_gaps            # messages misssed
+
+uint32 buffer_used_bytes       # current buffer fill in Bytes
+uint32 buffer_size_bytes       # total buffer size in Bytes
+
+uint8 num_messages