[Doc] Title: Unable to Locate Configuration for Enabling Streaming-Offload Mode

### Search before asking

- [X] I searched in the [issues](https://github.com/apache/pulsar/issues) and found nothing similar.

### What issue do you find in Pulsar docs?

Description:
After reading the [PIP-76: Streaming Offload documentation](https://github.com/apache/pulsar/wiki/PIP-76%3A-Streaming-Offload), I want to switch to the Streaming-Offload mode for my Pulsar deployment. However, I couldn't find any clear instructions or configuration settings in the documentation or the available configuration files to enable or set up Streaming-Offload mode.

### What is your suggestion?

Could you please clarify:

Where and how to enable Streaming-Offload mode?
Are there any prerequisites or additional setup steps not mentioned in the documentation?

### Any reference?

_No response_

### Are you willing to submit a PR?

- [X] I'm willing to submit a PR!

Start with the linked PIP-76: Streaming Offload documentation and the Pulsar configuration files mentioned in the issue. Confirm how Streaming-Offload mode is enabled and identify any prerequisites or setup steps, then document those instructions and verify that the resulting guidance is complete.

Written by the indexing model from the issue text.