GenericSystem: Add missing calculate_dynamics to docs (backport #1498)

[mergify]

calculate_dynamics was implemented with #1028 but not added to the docs. I also added a sample config and links to the examples.

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This is an automatic backport of pull request #1498 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 6e7a072 has failed:

On branch mergify/bp/iron/pr-1498
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	both modified:   hardware_interface/doc/mock_components_userdoc.rst

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