PX4 ROS2 msg conformity and explicit topics

- .msg files are PascalCase
 - topics are still either per msg or explicitly listed in TOPICS
 - compatible structs are still generated (eg struct msg_s), but ROS2 style px4::msg::Msg is also available

ROMFS/px4fmu_common/init.d-posix/CMakeLists.txt

@@ -36,7 +36,6 @@ add_subdirectory(airframes)
 px4_add_romfs_files(
 	px4-rc.mavlink
 	px4-rc.params
-	px4-rc.rtps
 	px4-rc.simulator
 	rc.replay
 	rcS

ROMFS/px4fmu_common/init.d-posix/px4-rc.rtps

@@ -1,4 +0,0 @@
-#!/bin/sh
-# shellcheck disable=SC2154
-
-micrortps_client start -t UDP -r $((2019+2*px4_instance)) -s $((2020+2*px4_instance))

ROMFS/px4fmu_common/init.d-posix/rcS

@@ -226,12 +226,6 @@ sensors start
 commander start
 navigator start
 
-# Try to start the micrortps_client with UDP transport if module exists
-if px4-micrortps_client status > /dev/null 2>&1
-then
-	. px4-rc.rtps
-fi
-
 if param greater -s MNT_MODE_IN -1
 then
 	gimbal start