Update development setup documentation

[zaneselvans]

PR Overview

• Replace black autoformatting instructions with ruff
• Include a note that you need to run git config to get nice conda lockfile merges.
• Make PUDL conda environment setup instructions less confusing.

PR Checklist

• Merge the most recent version of the branch you are merging into (probably dev).
• All CI checks are passing. Run tests locally to debug failures
• Make sure you've included good docstrings.
• For major data coverage & analysis changes, run data validation tests
• Include unit tests for new functions and classes.
• Defensive data quality/sanity checks in analyses & data processing functions.
• Update the release notes and reference reference the PR and related issues.
• Do your own explanatory review of the PR to help the reviewer understand what's going on and identify issues preemptively.

[zaneselvans]

I removed these details entirely, and defaulted to the instructions which use make. If folks want to see the detailed commands, they are listed in the Makefile

[cmgosnell]

i think that's great

[zaneselvans]

Swapped in ruff for black in the setup instructions.

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (fdd444d) 88.7% compared to head (4e0c235) 88.7%.
Report is 18 commits behind head on dev.

Files	Patch %	Lines
src/pudl/io_managers.py	81.8%	2 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##             dev   #3074   +/-   ##
=====================================
  Coverage   88.7%   88.7%           
=====================================
  Files         90      90           
  Lines      10994   10995    +1     
=====================================
+ Hits        9758    9759    +1     
  Misses      1236    1236           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.