add graphing calculator

[SuhasDissa]

TODO:

• Draw a given function on a graph
• Pan/Zoom gestures
• Parse string expressions
• UI to add/remove equations
• Dark mode support

[Bnyro]

Awesome job!

I've found some small UX things that we can think about in the future, such as

• making the color picker simpler to use (and accept hex color strings)
• finding a better solution than the bottom sheet
• naming functions differently than f(x)
• ...

However, I think we should merge this now and discuss other stuff later.

Though I have to admit that I didn't really review 100% of the code because it's just too much - I've tested the graphing calculator extensively however and think that it works pretty great!

[SuhasDissa]

Though I have to admit that I didn't really review 100% of the code because it's just too much - I've tested the graphing calculator extensively however and think that it works pretty great!

I spent a significant amount of time optimizing and testing the math expression parser function. I believe it's stable enough. Only issue it has is that it doesn't support parsing a function inside another function. Which I'll try to fix later.

Also, I'm planning to add these features later,

• Add support for variables
• Show the coordinates of a point when clicking on it