Native slashing SDK / routing mechanism

[maurolacy]

(This or an equivalent issue must be created on the mesh-security-sdk repo. Creating here for visibility / reference).

A x/meshsecurity module is required on the Provider, so that slashing events can be forwarded to the contracts for processing.

The native slashing implementation at the contracts level (#129) is done.

[maurolacy]

This would probably need to be a different project / repository. Something like mesh-security-provider-sdk or so.

Not sure, but perhaps some common library can be built, including functionality that can be used on both SDKs.