Add content for game-mathematics (#7307)

* Update game-mathematics, add one of the most best free books for learning game math

Multiple mathematics books specifically target game math but this is one of the best yet free.

* fix: resource formatting

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Co-authored-by: Arik Chakma <arikchangma@gmail.com>

src/data/roadmaps/game-developer/content/game-mathematics@m1wX27XBWKXZcTMH2U1xp.md

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 # Game Mathematics
 
 "Game Mathematics" is a critical aspect of game development that deals with the use of mathematical concepts to create and control game mechanics. This involves areas such as geometry for 3D modelling, logic for game rules, algebra for scoring systems, and trigonometry for movements or trajectories. Understanding game mathematics enables developers to implement features like physics simulation, AI behaviours, and procedural generation. Advanced topics include complex calculations for graphics (e.g., shaders, lighting) and calculus for continuous animation or advanced physics. The mathematical complexity depends on the game's demands, but a solid foundation is crucial for any game developer.
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+Learn more from the following resources:
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+- [@article@Game Math](https://gamemath.com/book/intro.html)