Add tinyxml2.natvis for debugging

[Caerind]

Hi !

I was debugging some elements today and I wanted better visualization.

I found this : https://github.com/cdcseacave/Visual-Studio-Visualizers/blob/master/TinyXML2.natvis

I think it could be added directly in the main repo.

[ajtruckle]

Out of interest, how does this help us? Bit beyond me - VS 2022 user

[Caerind]

Hi @ajtruckle !

I don't exactly know how you can add them in VS, but this link should explain it : https://docs.microsoft.com/en-us/visualstudio/debugger/create-custom-views-of-native-objects?view=vs-2022

(I'm actually using Sharpmake as a project generator and I can specify natvis directly in the project generation)

Natvis give us a better visualization of objects that can't be reprensented easily in VS debugger.

Here is an example of what I have in VS(2022, but should work with most versions I think) :

[leethomason]

@Caerind there's nothing wrong with the PR, but it's more to maintain. I'm trying to keep the platform dependent "extras" out, as much as I can.