feat(docs): add feedback config object with hide-feedback and require-email

[devin-ai-integration]

Description

Refs fern-api/fern-platform#11244

Adds a new top-level feedback configuration object to docs.yml schema with two properties:

• hide-feedback (bool, default false) — hides the feedback widget. If either this or layout.hide-feedback is true, feedback is hidden.
• require-email (bool, default false) — makes the email field required in the feedback form with submit-then-validate UX.

This is the CLI-side counterpart to the fern-platform PR that added FeedbackConfig to the FDR SDK types and updated the feedback form UI.

Changes Made

• Added FeedbackConfig type definition to fern/apis/docs-yml/definition/docs.yml
• Added feedback: optional<FeedbackConfig> to DocsConfiguration in the Fern API definition
• Added FeedbackConfig to the generated SDK types (API + serialization) since the generator cannot currently re-run
• Added FeedbackConfig Zod schema to DocsYmlSchemas.ts
• Added ParsedFeedbackConfig interface and feedback field to ParsedDocsConfiguration
• Added convertFeedbackConfig() in parseDocsConfiguration.ts to parse raw config
• Wired feedback through DocsDefinitionResolver to the FDR payload
• Updated docs-yml.schema.json with the new docs.FeedbackConfig definition
• Added CLI changelog entry

Testing

• Biome lint/format checks pass on modified files
• CI will validate full compilation and test suite

Link to Devin session: https://app.devin.ai/sessions/f125aa345be14831ba6b74d33833fbc1

[devin-ai-integration]

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