Update README.md

[Knightler]

feat(math-roadmap): Added structured courses with duration, effort, and prerequisites

• Added Probability & Statistics courses including Combinatorics, Probability, Statistics, Game Theory, and Applied Statistics
• Added Mathematical Analysis courses including Real Analysis, Numerical Analysis, Complex Analysis, and Optimization Theory
• Added Abstract Algebra courses including Abstract Algebra, Category Theory, Algebraic Geometry, and Algebraic Topology
• Included duration (weeks), effort (hours/week), and prerequisites for each course
• Structured in OSSU-style markdown format

[Knightler]

Hello OSSU team,

I’ve added a structured roadmap for Probability & Statistics, Mathematical Analysis, and Abstract Algebra in OSSU-style format.

The structure aligns with the existing roadmap format and enhances clarity for learners. I’d love your feedback, and I’m happy to make any revisions if needed.

Looking forward to your thoughts! 🚀

All the best.

[pulkitkrishna00]

This is a "path to a free self-taught education in Math". Most of the resources you have listed are not free, and thus cannot be included in OSSU.