Feature request: CNO

[samuelburbulla]

Implement Convolutional Neural Operators:

• https://arxiv.org/abs/2302.01178
• https://github.com/bogdanraonic3/ConvolutionalNeuralOperator

In this task, we could also implement standard U-Nets as (discretization-dependent) neural operators.

[JakobEliasWagner]

@samuelburbulla does #105 solve this issue?

[samuelburbulla]

No, #105 adds a classical CNN as (discretization-dependent) "neural operator", it's not the CNO from the paper.