Fix x-state in API explorer

[lcawl]

While playing in docs-builder I noticed that the code for handling x-state in the OpenAPI files was present, it just wasn't being rendered.

This PR seems to address the issue with two simple fixes.

For information about how to test this feature, refer to the docs I've crafted in #2879

Screenshots

Before

After

Works at both the operation-level:

Note that I extended that text to make sure it handled both the "since" and "lifecycle" info.
I also added one for testing purposes at the property-level:

Generative AI disclosure

1. Did you use a generative AI (GenAI) tool to assist in creating this contribution?

• Yes
• No

2. If you answered "Yes" to the previous question, please specify the tool(s) and model(s) used (e.g., Google Gemini, OpenAI ChatGPT-4, etc.).

Tool(s) and model(s) used: composer-1.5, claude-4.6-sonnet-medium

[Mpdreamz]

Lgtm, the reason I didn't add it was because I wanted to project it to applies to and render as applies to.

We can follow up with that though