[🔌 Provider]: add skywalking

[binsenzhan]

Describe the provider you want to add
Add any context about the tool and the kind of data you would want to pull/push from the provider.

skywalking
https://github.com/apache/skywalking

Describe your use case
Does this integration will help you to use Keep?

yes

Are you already using Keep?
Yes/No

yes

Additional context
Add any other context or screenshots about the provider request here.