Add supported units to metrics documentation.

[rodolfoBee]

Core or SDK?

Platform/SDK

Which part? Which one?

All SDKs that support metrics

Description

Currently only JS based SDKs have a section called Supported Performance Metric Units with the units supported by Sentry backend.

Suggested Solution

Expand it to the other supported SDKs: .NET, Android, Java, PHP, Python, Unity and Ruby.