Cia301 documentation

[Xi-HHHM]

Hi, this is a PR to extend the documentation regarding the ros2_control interface for ros2_canopen.

While the previous documentation introduces how to bring up the CiA402 profile, this extension mainly focuses on preparing the configuration to bring up the CAN using ros2_control and introducing the CiA301 profile.

Examples of bus configuration and controller manager are given.

[hellantos]

@Xi-HHHM thanks for the PR this is great documentation!

I will not merge this into master directly but rather to the beta-release-documentation branch.

[Xi-HHHM]

@ipa-cmh Hi, thank you for the feedback. Now I changed the base to documentation-for-beta-release

[hellantos]

Thanks merged it in!