Adapt LAD framework to dandi-cli project practices

[yarikoptic]

In .lad/ framework for AI agents this PR does:

• Remove numpy/pandas from dependency list (not used by this project)
• Remove leaked emuses/ references from another project across 7 files
• Replace FastAPI/Django/Flask examples with click CliRunner (CLI project)
• Replace hardcoded Python 3.11 with "see pyproject.toml"
• Replace raw pip install recommendations with tox/pre-commit references
• Replace generic config file creation with "verify existing configs"
• Update test commands to use tox -e py3 / python -m pytest dandi
• Replace project-specific test categories with generic {{category}} placeholders
• Update testing strategy to reflect CLI, API client, and file processing patterns
• Add @pytest.mark.ai_generated requirement to LAD CLAUDE.md

This should make it more up to the point of dandi-cli development!

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.10%. Comparing base (fb21800) to head (a344d4d).
⚠️ Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1805      +/-   ##
==========================================
- Coverage   75.11%   75.10%   -0.02%     
==========================================
  Files          84       84              
  Lines       11925    11925              
==========================================
- Hits         8958     8956       -2     
- Misses       2967     2969       +2     

Flag	Coverage Δ
unittests	75.10% <ø> (-0.02%)	⬇️

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[CodyCBakerPhD]

@yarikoptic I don't quite understand, your PR description states things I would expect to see changed in source not just a bunch of AI prompts/skills

[yarikoptic]

I added opening to the description to point that it is just about .lad/ . Makes it clearer? if good enough -- please merge upon approve ;)

[CodyCBakerPhD]

It's just that when I read a PR description line of

Remove numpy/pandas from dependency list (not used by this project)

I take that to mean that you modified the pyproject.toml

But you are saying all you did was remove some text to the agents about restricting that? https://github.com/dandi/dandi-cli/pull/1805/changes#diff-f2f065b85fdc8fc2f7497ca92c577e258caf9bbed526dd15eee68f628d9cb0feL13

[yarikoptic]

sorry -- I am not following. I just instructed clude to tune LAD framework to what we actually have in dandi-cli, hence it removed stuff which is not pertinent (e.g. stating pandas as dependency) and pointed to correct places (like pyproject.toml)... what am I missing in your concern?

[CodyCBakerPhD]

Next time just set PR description to "Improvements to .lad framework"

For each of the items above, I have or would expect to see a PR description given with that exact verbiage, but not affecting internal AI context and instead making the stated change to the actual source code itself.