Fix Rosenbrock docstring placement and remove duplicates

- Remove citation comments from algorithms.jl (now in docstrings)
- Move docstrings inside @eval blocks for proper documentation
- Remove unnecessary algorithm symbols from generic_rosenbrock.jl
- Ensure docstrings are properly attached to struct definitions

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: ChrisRackauckas