Add singleton logger

[rayg1234]

The singleton logger will let us log from anywhere in the code. This will also replace the old loggers that can be deprecated. User just need to specify logger.name = wandb_singleton

Example Usage (can be placed anywhere):
WandBSingletonLogger.get_instance().log({"energy": energy.max()}, commit=False)

Note the commit = False will let wandb know the logging of the current isn't complete and will log the output when the step is updated (ie: in the trainer)

[codecov]

Codecov Report

Attention: Patch coverage is 40.00000% with 24 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/fairchem/core/common/logger.py	37.14%	22 Missing ⚠️
src/fairchem/core/trainers/base_trainer.py	60.00%	2 Missing ⚠️

Files with missing lines	Coverage Δ
src/fairchem/core/trainers/base_trainer.py	87.58% <60.00%> (-0.34%)	⬇️
src/fairchem/core/common/logger.py	58.97% <37.14%> (-9.32%)	⬇️

[misko]

LGTM! 🚀