Customize Platform Abstraction Layer

For an easier integration of iceoryx2 on different platforms, users need sometimes to customize settings in iceoryx2-pal. An example is that users may want to change the ICEORYX2_ROOT_PATH as defined in iceoryx2-pal/configuration/src/lib.rs on a different embedded platform. Currently, users need to change the values within the lib.rs directly and recompile.

Improvement Suggestion

We should give the user the ability to pass a custom platform and platform setting to iceoryx2
so that they can run iceoryx on their own platforms.
To achieve this we could go in two stages:

• Give ability to iceoryx2-pal-configuration to pass a custom platform config file
• Give ability to iceoryx2-pal-posix to pass a custom POSIX platform abstraction