add pack_lists class function

[dougbrn]

Change Description

Resolves #131

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

Solution Description

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

[github-actions]

Before [975fbc8]	After [2d12de8]	Ratio	Benchmark (Parameter)
34.2±3ms	35.8±1ms	1.05	benchmarks.AssignSingleDfToNestedSeries.time_run
10.4±0.2ms	10.7±0.3ms	1.03	benchmarks.NestedFrameAddNested.time_run
7.02±0.2ms	7.11±0.2ms	1.01	benchmarks.NestedFrameQuery.time_run
87.1M	87M	1	benchmarks.NestedFrameAddNested.peakmem_run
92M	92.3M	1	benchmarks.NestedFrameQuery.peakmem_run
90.8M	90.7M	1	benchmarks.NestedFrameReduce.peakmem_run
260M	258M	0.99	benchmarks.AssignSingleDfToNestedSeries.peakmem_run
1.14±0.03ms	1.11±0.02ms	0.97	benchmarks.NestedFrameReduce.time_run
281M	272M	0.97	benchmarks.ReassignHalfOfNestedSeries.peakmem_run
75.5±5ms	72.0±3ms	0.95	benchmarks.ReassignHalfOfNestedSeries.time_run

Click here to view all benchmarks.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.46%. Comparing base (975fbc8) to head (b087283).
Report is 58 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #136   +/-   ##
=======================================
  Coverage   99.45%   99.46%           
=======================================
  Files          14       14           
  Lines         917      932   +15     
=======================================
+ Hits          912      927   +15     
  Misses          5        5           

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[wilsonbb]

Looks good to me just a few small test cases I think it would be nice to add

(Sorry I thought I had reviewed this earlier in the week, but it seemed to have slipped by)

[wilsonbb]

LGTM!