Creating RTOS-specific tutorials from common sections. (#172)

* Started refactoring of the three RTOS-specific first micro-ROS application tutorials.

Signed-off-by: Ralph Lange <ralph.lange@de.bosch.com>

* Completed factoring out the common sections in RTOS-specific tutorials.

Signed-off-by: Ralph Lange (CR/AEE1) <ralph.lange@de.bosch.com>

* Fixed paths to images.

Signed-off-by: Ralph Lange (CR/AEE1) <ralph.lange@de.bosch.com>

* Added logos to overview page.

Signed-off-by: Ralph Lange (CR/AEE1) <ralph.lange@de.bosch.com>

* Added link back to selection of RTOS.

Signed-off-by: Ralph Lange (CR/AEE1) <ralph.lange@de.bosch.com>

* Fixed link to Linux-based tutorial.

* Fixed link to Linux-based tutorial.

* Fixed permalink of Zephyr-based tutorial.

* Minor improvements

* Fix Zephyr transport

* Removed redundant sentence.

* Removed redundant sentence.

* Removed redundant sentence.

* Fixed link to NuttX ping-pong demo.

* Update index.md

* Update index.md

* Update index.md

* Update index.md

* Revert "Update index.md"

This reverts commit 2d6f118.

* Revert "Update index.md"

This reverts commit 5b24b2e.

* Revert "Update index.md"

This reverts commit 8f67a39.

* Revert "Update index.md"

This reverts commit 2a2b664.

Co-authored-by: Pablo Garrido <pablogs9@gmail.com>
Co-authored-by: FranFin <58737168+FranFin@users.noreply.github.com>

Author: 3 people

.vscode/settings.json

@@ -52,7 +52,6 @@
    - tutorials/advanced/tracing
    - tutorials/advanced/benchmarking
    - tutorials/advanced/zephyr_emulator
-   - tutorials/advanced/zephyr/zephyr_getting_started
 
 - title: Demos
   docs: