[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