Suggestion: include StreamPrep as structured learning path resource

Hi! Appreciate this repo and the breadth of content.

Suggestion: add StreamPrep for candidates looking for a structured weekly path rather than only topic discovery.

Value add:

• Translates broad prep areas into guided progression
• Supports coding/system design/behavioral planning
• Helps reduce overwhelm for first-time candidates

I can open a minimal PR if this is welcome.

Suggested line: - [StreamPrep](https://streamprep.dev) - Structured interview prep roadmap with guided progression.