docs(ecosystem): add an agent-side libraries section

[quotentiroler]

The ecosystem page covers renderers thoroughly. There is no home for projects on the producing side, which is where agent_sdks/ sits and where TypeScript currently has no entry.

This adds an "Agent-Side Libraries" section with one row, for a TypeScript library that emits A2UI rather than rendering it.

If you would rather it went in community.md, or you want it held until more than one project qualifies, say so and I will close it.

Announcement discussion: #2406

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[gemini-code-assist]

Code Review

This pull request adds a new "Agent-Side Libraries" section to the ecosystem renderers documentation, introducing the Max-Health-Inc/prefab project. The review feedback suggests capitalizing "Basic Catalog" for consistency and formatting the table columns to align with Prettier styling.

[gemini-code-assist]

To maintain consistency with the rest of the document, "Basic catalog" should be capitalized as "Basic Catalog". Additionally, the table columns should be aligned to match the Prettier formatting style used throughout the rest of the file.

Suggested change

	| Project | Language | Description | Links |
	| ------- | -------- | ----------- | ----- |
	| **Max-Health-Inc/prefab** (`@maxhealth.tech/prefab`) | TypeScript | Server-side component library that emits A2UI from a typed component tree, with a diagnostic for anything the Basic catalog cannot express. Also serves A2UI over MCP as an `a2ui://` resource or an embedded resource. | [GitHub](https://github.com/Max-Health-Inc/prefab) · [npm](https://www.npmjs.com/package/@maxhealth.tech/prefab) · [Docs](https://maxhealth.tech/prefab/guide/a2ui) |
	| Project | Language | Description | Links |
	| ----------------------------------------------------- | ---------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------- |
	| **Max-Health-Inc/prefab** (@maxhealth.tech/prefab) | TypeScript | Server-side component library that emits A2UI from a typed component tree, with a diagnostic for anything the Basic Catalog cannot express. Also serves A2UI over MCP as an a2ui:// resource or an embedded resource. | [GitHub](https://github.com/Max-Health-Inc/prefab) · [npm](https://www.npmjs.com/package/@maxhealth.tech/prefab) · [Docs](https://maxhealth.tech/prefab/guide/a2ui) |

References

1. Code should follow the relevant style guides, and use the correct auto-formatter, for each language, as described in the repository contributing guide's Style section. ^(link)

[quotentiroler]

CLA signed.