Add support to Celltypist for non-human species.

[tbrittoborges]

Description of feature

Currently, CELLTYPE_ASSIGNMENT:CELLTYPES_CELLTYPIST fails for data other than from human:

  Traceback (most recent call last):
    File ".command.sh", line 42, in <module>
      predictions = celltypist.annotate(
                    ^^^^^^^^^^^^^^^^^^^^
    File "/opt/conda/lib/python3.12/site-packages/celltypist/annotate.py", line 81, in annotate
      predictions = clf.celltype(mode = mode, p_thres = p_thres)
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/opt/conda/lib/python3.12/site-packages/celltypist/classifier.py", line 355, in celltype
      raise ValueError(
  ValueError: 🛑 No features overlap with the model. Please provide gene symbols

However, Celltypist supports species conversion. See this issue for details.

There are many ways one can approach a fix two this:

• Try-except block, trying to recover from the ValueError with a convert step.
• Allowing users to provide map_file, which maps human genes to their target organism.
• Allowing users to provide a local model (pkl file), pre-converted.

The last provides more flexibility for users that train their own model.