Add missing Wikipedia references to technical topics

[Copilot]

The README documents daily class topics but lacked Wikipedia links for several fundamental concepts, despite using them for similar topics like vectors and velocity.

Changes

Added Wikipedia references using the existing 🔗Additional information at https://en.wikipedia.org/wiki/... format for:

• Mathematics: Orthogonality, Rotation, Polygon, Radian
• Physics: Newton's laws of motion, Rigid body dynamics
• Computer Science: Collision detection, Hyperplane separation theorem (SAT), Model-View-Controller

Example from the "Orthogonal Vectors" section:

## 💡New Idea: Orthogonal Vectors
- Two vectors are orthogonal if their dot product is 0. 
- This is the same as having a 90 degree angle between them
- In 2D, the vector (x,y) is orthogonal to (-y, x) and (y, -x)
- 🔗Additional information at https://en.wikipedia.org/wiki/Orthogonality

Increased Wikipedia reference coverage from 3 to 12 topics across the README.

Original prompt

This README gives a description of what we talk about in class everyday. I like to have links to Wikipedia pages for the topics we cover, but sometimes I forget to add them. Can you look and see the format I use when I reference wikipedia and then change the code so that missing references are added in that format?

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