feat(flotilla): Plan explain

[colin-ho]

Changes Made

Example:

* DistributedLimit
|   Node ID: 1
|   Limit: 10
|
* DistributedScan
|   Node ID: 0
|   Local Plan: PhysicalScan->Project->ActorPoolProject->Limit

Right now it's very simple, and just shows the names of the instructions, e.g. PhysicalScan->Project->ActorPoolProject->Limit.

I can't figure out how to display the local physical plans per pipeline node yet.

Related Issues

Checklist

• Documented in API Docs (if applicable)
• Documented in User Guide (if applicable)
• If adding a new documentation page, doc is added to docs/mkdocs.yml navigation
• Documentation builds and is formatted properly (tag @/ccmao1130 for docs review)

[codecov]

Codecov Report

Attention: Patch coverage is 10.98901% with 243 lines in your changes missing coverage. Please review.

Please upload report for BASE (main@c5153e6). Learn more about missing BASE report.
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
src/daft-distributed/src/stage/mod.rs	12.82%	68 Missing ⚠️
...-distributed/src/pipeline_node/in_memory_source.rs	3.33%	29 Missing ⚠️
.../daft-distributed/src/pipeline_node/scan_source.rs	3.57%	27 Missing ⚠️
...daft-distributed/src/pipeline_node/intermediate.rs	3.84%	25 Missing ⚠️
...rc/daft-distributed/src/pipeline_node/actor_udf.rs	0.00%	20 Missing ⚠️
src/daft-distributed/src/pipeline_node/mod.rs	0.00%	19 Missing ⚠️
src/daft-distributed/src/pipeline_node/limit.rs	5.55%	17 Missing ⚠️
daft/dataframe/dataframe.py	6.66%	14 Missing ⚠️
src/daft-local-plan/src/plan.rs	0.00%	12 Missing ⚠️
src/daft-distributed/src/python/mod.rs	0.00%	10 Missing ⚠️
... and 1 more

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4517   +/-   ##
=======================================
  Coverage        ?   77.54%           
=======================================
  Files           ?      847           
  Lines           ?   116337           
  Branches        ?        0           
=======================================
  Hits            ?    90208           
  Misses          ?    26129           
  Partials        ?        0           

Files with missing lines	Coverage Δ
...rc/daft-distributed/src/pipeline_node/translate.rs	92.37% <100.00%> (ø)
src/daft-distributed/src/plan/mod.rs	60.86% <100.00%> (ø)
src/daft-distributed/src/stage/stage_builder.rs	50.88% <100.00%> (ø)
src/daft-distributed/src/plan/runner.rs	0.00% <0.00%> (ø)
src/daft-distributed/src/python/mod.rs	26.59% <0.00%> (ø)
src/daft-local-plan/src/plan.rs	71.81% <0.00%> (ø)
daft/dataframe/dataframe.py	85.41% <6.66%> (ø)
src/daft-distributed/src/pipeline_node/limit.rs	16.89% <5.55%> (ø)
src/daft-distributed/src/pipeline_node/mod.rs	15.00% <0.00%> (ø)
...rc/daft-distributed/src/pipeline_node/actor_udf.rs	0.00% <0.00%> (ø)
... and 4 more

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