add wrapper functions: from_pandas, from_delayed, from_map

[dougbrn]

Change Description

Resolves #33.

• My PR includes a link to the issue that I am addressing

Solution Description

Implements 3 dask wrapper functions: from_pandas, from_delayed, and from_map. from_pandas works with both Pandas DataFrames and Nested-Pandas NestedFrames, so this PR also removes from_nested_pandas in favor of from_pandas

Code Quality

• I have read the Contribution Guide
• My code follows the code style of this project
• My code builds (or compiles) cleanly without any errors or warnings
• My code contains relevant comments and necessary documentation

New Feature Checklist

• I have added or updated the docstrings associated with my feature using the NumPy docstring format
• I have updated the tutorial to highlight my new feature (if appropriate)
• I have added unit/End-to-End (E2E) test cases to cover my new feature
• My change includes a breaking change
  • My change includes backwards compatibility and deprecation warnings (if possible)

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[github-actions]

Before [60cae9a]	After [ef7679b]	Ratio	Benchmark (Parameter)
failed	150M	n/a	benchmarks.NestedFrameAddNested.peakmem_run
failed	212±1ms	n/a	benchmarks.NestedFrameAddNested.time_run
failed	151M	n/a	benchmarks.NestedFrameQuery.peakmem_run
failed	457±2ms	n/a	benchmarks.NestedFrameQuery.time_run
failed	148M	n/a	benchmarks.NestedFrameReduce.peakmem_run
failed	218±2ms	n/a	benchmarks.NestedFrameReduce.time_run

Click here to view all benchmarks.

[smcguire-cmu]

Looks good, thanks!