Create vcpkg package

[brenocq]

A user on Reddit suggested adding ImPlot3D to vcpkg, which would make installation and dependency management easier for some C++ developers. This would allow users to integrate ImPlot3D seamlessly into their projects without manually managing source files.

[brenocq]

This task is getting way more upvotes than the other tasks, I'm moving it to high-priority

[brenocq]

I just saw that @RT2Code started working on this task the day it was created (super fast haha). He has already raised the PR (microsoft/vcpkg#43876) and is now waiting for approval.

Thank you, Rémy!"

[RT2Code]

Yes, your library is awesome and, like implot, was a breeze to use. Nice work. I expect the PR to be merged in 1 or 2 days.

[brenocq]

Amazing! Thank you for taking the time to work on it.

[brenocq]

Under review in #69!

[brenocq]

PR is merged and the vcpkg package is available here: https://vcpkg.link/ports/implot3d thanks to @RT2Code.