[Feature] Detect Conda env files for project recommendations

[GyaneshSamanta]

internal/project/detector.go maps file patterns to stores, but it only looks for requirements.txt, pyproject.toml, and Pipfile when deciding the Python/data-science stack. Projects that rely on environment.yml (Conda) or conda.yml lose out on automatic detection and do not get the cue store install data-science recommendation.

Could we add detection signals for environment.yml, conda.yml, and even .envrc files so that the StoreName can point to data-science (or another store) when these files are present? That would cover the common Conda/science workflows that the current detector silently ignores.