[Feature] Add support to auto generate client whenever SpaceCloud's RPC provider gets updated

[YourTechBud]

The problem faced currently?

I need to manually run the spacectl client gen whenever I want consume the latest published APIs. This required me to perform the following steps:

• Dowload the openapi.json file from SC
• Run the client gen command

How can we solve it?

• Use the pubsub provider of SC to generate events whenever RPC provider updates.
• Create a spacectl client sync --url <SC URL> command to:
  • Subscribes to RPC provider provisioned event
  • On event received generate the client based on the openapi present in the event payload

If you want this feature to be implemented, give it a thumbs up reaction, so that we can determine which features are important to you.
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