Add oauth2 examples of other language clients

[wolfstudy]

Currently, we provider Go, Cpp and Java client examples, maybe we need to provide examples of other language clients

• Python Add token examples of python #25
• nodejs Add token examples of python #25
• pulsar-admin Add token examples of python #25
• pulsarctl Add token examples of python #25
  • token
  • oauth2
• ruby
• c#
• websocket
• rust
• pulsar-perf(pulsar-client) Add token examples of python #25

[sijie]

I don't think we support websocket in Cloud yet. We can skip websocket.

[wolfstudy]

I don't think we support websocket in Cloud yet. We can skip websocket.

Ok, get it.