Add __repr__ for Registry.__repr__(cls)

[Zethson]

>>> import lamindb as ln; ln.Artifact; ln.Param

results in

Artifact
  Basic fields
    .id: AutoField
    .uid: CharField
    .description: CharField
    .key: CharField
    .suffix: CharField
    .type: CharField
    .accessor: CharField
    .size: BigIntegerField
    .hash: CharField
    .hash_type: CharField
    .n_objects: BigIntegerField
    .n_observations: BigIntegerField
    .visibility: SmallIntegerField
    .key_is_virtual: BooleanField
    .version: CharField
    .created_at: DateTimeField
    .updated_at: DateTimeField
  Relational fields
    .created_by: User
    .storage: Storage
    .transform: Transform
    .run: Run
    .ulabels: ULabel
    .input_of: Run
    .previous_runs: Run
    .feature_sets: FeatureSet
    .feature_values: FeatureValue
    .param_values: ParamValue
    .latest_report_of: Transform
    .source_code_of: Transform
    .report_of: Run
    .environment_of: Run
    .collection: Collection
    .collections: Collection
  Bionty fields
    .organisms: bionty.Organism
    .genes: bionty.Gene
    .proteins: bionty.Protein
    .cell_markers: bionty.CellMarker
    .tissues: bionty.Tissue
    .cell_types: bionty.CellType
    .diseases: bionty.Disease
    .cell_lines: bionty.CellLine
    .phenotypes: bionty.Phenotype
    .pathways: bionty.Pathway
    .experimental_factors: bionty.ExperimentalFactor
    .developmental_stages: bionty.DevelopmentalStage
    .ethnicities: bionty.Ethnicity
  Wetlab fields
    .experiments: wetlab.Experiment
    .wells: wetlab.Well
    .treatment_targets: wetlab.TreatmentTarget
    .treatments: wetlab.Treatment
Param
  Basic fields
    .id: BigAutoField
    .name: CharField
    .dtype: CharField
    .created_at: DateTimeField
    .updated_at: DateTimeField
  Relational fields
    .created_by: User
    .run: Run
    .previous_runs: Run
    .paramvalue: ParamValue

[sunnyosun]

Why did you decide to add the code here instead of in lamindb? I think this repo should mainly contain code for the models. You could move them to https://github.com/laminlabs/lamindb/blob/main/lamindb/_record.py?

[falexwolf]

I think I moved it here at some point because there was a tricky issue with import order. There is logic that only used lnschema_core without lamindb in lamindb_setup (which is the whole big reason for this complicated architecture).

Let's briefly think through side effects of moving this into lamindb. I'd keep it here for now.

I should have made a comment back then. There was definitely a reason.

[falexwolf]

FYI: Showing this off here in the introduction:

https://github.com/laminlabs/lamindb/pull/1748/files