feat: Xamarin docs

[lucas-zimerman]

The following pull request adds to sentry-docs the Xamarin and Xamarin forms doc page.

[vercel]

This pull request is being automatically deployed with Vercel (learn more).
To see the status of your deployment, click below or on the icon next to each commit.

🔍 Inspect: https://vercel.com/sentry/sentry-docs/poloqrko3/sentry.dev
✅ Preview: https://sentry-docs-git-fork-lucas-zimerman-feat-xamarin-docs.sentry.dev

[bruno-garcia]

You'll need a few more changes though:

https://sentry-docs-git-fork-lucas-zimerman-feat-xamarin-docs.sentry.dev/platforms/dotnet/guides/xamarin/ignoring-exceptions/

This snippet would need to be rewritten:
This file: https://github.com/getsentry/sentry-docs/blob/master/src/platforms/dotnet/common/ignoring-exceptions.mdx

Could be copied to dotnet/guides/xamarin/common/ignoring-exceptions.mdx and changed to SentryXamarin.Init.

[vercel]

@lucas-zimerman is attempting to deploy a commit to the Sentry Team on Vercel.

A member of the Team first needs to authorize it.

[bruno-garcia]

Isn't this Sentry.Xamarin?

[lucas-zimerman]

we are using namespace Sentry for the public classes.