Expose SS Typehints

[MattToast]

Add and ship py.typed marker per pep-561. This change will help change the mypy output for this script

from smartsim import Experiment
from smartredis import Client

exp = Experiment(b"my-exp")  # Should err expected str
client = Client(False)

reveal_type(exp)
reveal_type(client)

from this

$ mypy script.py
script.py:1: error: Skipping analyzing "smartsim": module is installed, but missing library stubs or py.typed marker  [import-untyped]
script.py:1: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
script.py:2: error: Skipping analyzing "smartredis": module is installed, but missing library stubs or py.typed marker  [import-untyped]
script.py:7: note: Revealed type is "Any"
script.py:8: note: Revealed type is "Any"
Found 2 errors in 1 file (checked 1 source file)

to this

$ mypy script.py
script.py:4: error: Argument 1 to "Experiment" has incompatible type "bytes"; expected "str"  [arg-type]
script.py:7: note: Revealed type is "smartsim.experiment.Experiment"
script.py:8: note: Revealed type is "smartredis.client.Client"
Found 1 error in 1 file (checked 1 source file)

[al-rigazzi]

LGTM! Thanks for taking another step towards modern Python!

[codecov]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (50aa382) 90.80% compared to head (8de5f21) 90.43%.
Report is 2 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #468      +/-   ##
===========================================
- Coverage    90.80%   90.43%   -0.38%     
===========================================
  Files           60       60              
  Lines         3829     3837       +8     
===========================================
- Hits          3477     3470       -7     
- Misses         352      367      +15     

Files	Coverage Δ
smartsim/database/orchestrator.py	86.85% <100.00%> (ø)
smartsim/entity/dbobject.py	64.81% <100.00%> (-0.33%)	⬇️
smartsim/entity/ensemble.py	97.61% <ø> (-1.59%)	⬇️
smartsim/entity/model.py	95.51% <100.00%> (+0.08%)	⬆️
smartsim/ml/data.py	94.37% <75.00%> (ø)
smartsim/ml/tf/data.py	88.63% <66.66%> (ø)
smartsim/_core/utils/redis.py	80.39% <50.00%> (-2.59%)	⬇️

... and 6 files with indirect coverage changes

[al-rigazzi]

Re-approving and praising the effort of catching all those type errors!