web.cpp cleanup

[Bixkitts]

Just a little janitorial work, I simply like to clean as I read.

I did the following:

• Broke up some massive 200-400 line functions into smaller ones.
• Replaced some switches+enums with branchless function arrays for speed and readability.
• Binary size is SLIGHTLY smaller.

I can undo the weird indentation stuff if you don't like it,
but C++ Core Guidelines encourage liberal use of whitespace for
legibility.

C++ code is still very C-like, could make it more "idiomatic",
but I'm happy with it.
Tested it on our hardware and still seems to do what it should when I click around!
Please double check function arrays (for off-by 1 or wrong indices), and getRootData() - I reordered a lot of code.

If these kind of changes are welcome, I'm happy to do some more.

[xyzroe]

Wow, thank you for your work. 🚀
This is very impressive!

I'm currently on a short vacation, so I won't be able to review your work right now. I trust your tests are sufficient, and any issues that arise later can be fixed then.

Regarding formatting - I use a plugin that handles indentation. If it doesn't remove your added whitespace, that's fine by me, it's not a big deal.

Any improvements to the code, whether it's fixing bugs or enhancing readability and performance, are always welcome.

Thanks again, and keep up the great work! 🤝

[github-actions]

Thanks @Bixkitts 🏆