* working debugging (one click build and debug)
   * SITL jmavsim
   * SITL gazebo
   * jlink px4_fmu-v{2-5}
 * improved syntax highlighting
   * GNU linker files
   * ROS message files msg/*.msg
   * jinja2 template files
 * fixed intellisense support

 - add cmake language support to recommend extensions
 - jlink debug add stm32f427 svd
 - gitignore updates for vscode

 - deploy px4 metadata using target
 - clang scan-build upload output to s3
 - clang-tidy properly check headers
 - add cppcheck helper
 - force gcc color

Move RC and DL failsafe actions handling from navigator to commander (credits to @AndreasAntener)
Separate manual kill switch handling via manual_lockdown to prevent override and release of software lockdown by RC switch

Other changes:
Add failsafe tune
Fix LED blinking for Pixracer
Return back support for rc inputs in simulator but now it is configurable via cmake

-closes #5862