* fixing ns-eval when datamanager is set to disk for splats
* fixing prefetch_factor type issues if user decides to use 0 workers
* removing accidental file
* fixing depth nerfacto config for issue 3592
* ruff linting the imports
* fixing workers creating GPU tensors serialization error
* finished next_eval
* adding flowcharts!
* fixing ruff
* added flowcharts into datamanagers.md
* simplying code and adding GPU serialization fix for both datamanagers
* fixing nits with consistent styling
* last optional nit
* fixing num workers
Anthony Zhang
Matthew Tancik