Refactor parameter initialization

[lkct]

With reparam class added, the params do not necessarily mean the same as before, and the way to initialize them may need to be changed.

Therefore we need to double-check what exists in the repo (e.g. reset_parameters) and refactor those if needed.

[lkct]

NOTE: some Layers can have children Modules or Parameters which might or might not be initialized by themselves.

We need to double-check what exactly it resets in reset_parameters and how reset is called in __init__. We need to design whether a layer inits/resets its direct parameters or all children. We also need to check how this interacts with Reparameterization , which is also a Module

[loreloc]

This will be solved by adding symbolic initializer: only the user who is aware of the parameterization is capable of specifying a suitable initialization.