Symplectic Autoencoder and PSD architecture

[benedict-96]

Implemented a symplectic autoencoder and a PSD architecture. For the PSD architecture we don't perform training but use solve!. They are both subtypes of AutoEncoder. Much of the functionnality for SymplecticAutoencoder and PSDArch is performed by this generic AutoEncoder type.

[codecov]

Codecov Report

Attention: Patch coverage is 82.75862% with 25 lines in your changes are missing coverage. Please review.

Project coverage is 68.13%. Comparing base (45908cc) to head (08a4345).
Report is 4 commits behind head on main.

Files	Patch %	Lines
src/architectures/symplectic_autoencoder.jl	79.16%	10 Missing ⚠️
src/data_loader/batch.jl	47.05%	9 Missing ⚠️
src/architectures/autoencoder.jl	93.33%	2 Missing ⚠️
src/architectures/psd.jl	92.59%	2 Missing ⚠️
src/reduced_system/reduced_system.jl	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #138      +/-   ##
==========================================
+ Coverage   67.37%   68.13%   +0.76%     
==========================================
  Files         116      119       +3     
  Lines        3169     3314     +145     
==========================================
+ Hits         2135     2258     +123     
- Misses       1034     1056      +22     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[michakraus]

Please rename get_encoder, get_decoder and similar functions and remove the get_.

[benedict-96]

I thought that the get_ may be appropriate in this particular case because we don't actually compute anything or allocate new memory. The SymplecticAutoencoder stores the parameters for the encoder and the decoder (they are trained simultaneously) and after training we can "get" the encoder (or decoder) by using get_encoder (or get_decoder). We could however also rename get_encoder -> obtain_encoder for example.

[benedict-96]

Changed names of functions:

• get_encoder -> encoder
• get_decoder -> decoder