Problems with include path of libraries in microros

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## Issue template

- Hardware description: STM
- RTOS: freeRTOS
- Installation type: microros_setup
- Version or commit hash: iron

#### Steps to reproduce the issue
I have compiled Microros as a static lib and added it using the compile flags. I have also added the folder libmicroros/include as an include path. However, the code does not find any of the headers because the folders are organized in the following way:
library_name/library_name/header_file.h. That's because the includes are /library_name/headear_file.h. In other words, I am forced to add each folder path as an include path. Is there a way to make it simpler? In the previous version of Microros, the folder organization was /library_name/headear_file.h, and the new version's code still follows that standard.

Commencez par inspecter la sortie de microros_setup qui crée libmicroros/include, ainsi que les options de compilation utilisées pour la bibliothèque statique. Le travail est terminé lorsque les headers générés peuvent être inclus à l’aide d’un seul chemin d’inclusion, sans ajouter séparément chaque répertoire de bibliothèque, tout en respectant l’organisation des inclusions utilisée par le code.

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