Audit and expand llms.txt API reference

[leoafarias]

This PR audits and updates llms.txt to match the current ack and ack_annotations API surface on 1.0.0-beta.9. It adds missing reference coverage for object composition helpers, string/number/list fluent constraints, typed parseAs/safeParseAs mapper usage, SchemaResult.map, annotation options, and canonical JsonSchema model fields. It also fixes stale version/deprecation notes and clarifies current @AckType discriminated and nullable behavior. The docs/llms.txt.mdx redirect page is removed so llms.txt remains the single canonical source.

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[Copilot]

Pull request overview

This PR updates the repository’s llms.txt reference document to reflect the current Ack / ack_annotations API surface for 1.0.0-beta.9, and removes the docs-site redirect page so the root llms.txt is the intended single canonical source.

Changes:

• Expanded llms.txt API reference coverage (object composition helpers, fluent constraints, parseAs/safeParseAs, SchemaResult.map, annotation options, JsonSchema model surface).
• Updated version and “supported vs next beta” notes to 1.0.0-beta.9, and adjusted guidance around @AckType / nullable behavior.
• Removed docs/llms.txt.mdx redirect and simplified the docs workflow to only assert llms.txt exists.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 4 comments.

File	Description
llms.txt	Adds/updates API reference coverage and examples for beta.9.
docs/llms.txt.mdx	Removes the docs-site redirect page for /llms.txt.
.github/workflows/docs.yml	Drops redirect verification; now only checks root llms.txt exists before running docs.page validation.

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[Copilot]

With docs/llms.txt.mdx removed, the docs site no longer appears to have a /llms.txt route, but docs/index.mdx still links to /llms.txt as a redirect target. Consider restoring a docs route (redirect page or static file) or updating the docs link to point directly at the canonical raw llms.txt URL, and add a CI check that this route/link stays valid.