Add couplingICubEye device

[martinaxgloria]

This pull request introduces the new couplingICubEye coupling handler device.
Need to test it
It implements the IJointCoupling interface:

• IJointCoupling: an interface for handling coupled joints yarp#3026

[pattacini]

We have to get aligned on the name as the Eyes Mk3 do refer to an internal experiment that is obsolete.
Also, Mk2 and Mk4 do have essentially the same mechanism with tiny different kinematic params.

[Nicogene]

This PR has been tested with:

• iCubGazeboV2_5_visuomanip: add support for gz-sim icub-models#249
• Add couplingICubHandMk2 device coupling handler #995

@pattacini @traversaro it is ready to be reviewed/merged

[traversaro]

Minor comments.

[traversaro]

Is the device on by default? If not, could it make sense to enable it by default or add it to the default preset?

[Nicogene]

Tested together!

[Nicogene]

Is the device on by default? If not, could it make sense to enable it by default or add it to the default preset?

Yes it is enabled by default, it does not have external dependencies except YARP

[pattacini]

Hi @Nicogene @martinaxgloria

Could you please address the conflicts?

[pattacini]

Awaiting the CI before merging.