[Feature] Add Serialization for QuantumCircuit and Embedding

[dominikandreasseitz]

cc @Roland-djee

Possible options:

1. JSON (like qadence) or https://pytorch.org/docs/stable/notes/serialization.html for QuantumCircuit
2. tensordict serialization for Embedding https://pytorch.org/docs/stable/notes/serialization.html

[jpmoutinho]

To note that @vytautas-a is currently reviewing the embedding in #228, changes may come from it.

[mlahariya]

Not relevant for now. @RolandMacDoland - can you please let us know if this is needed/priority? if not, we can close this.

[RolandMacDoland]

Not relevant for now. @RolandMacDoland - can you please let us know if this is needed/priority? if not, we can close this.

I don't think so now. Serialisation is likely to happen elsewhere (Qadence) I assume. We can re-open if there is a need.