LEAN-4643: add ability to change citation style

[mbetamony]

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[Copilot]

Pull Request Overview

Adds an optional citationStyle attribute to the ManuscriptAttrs interface to allow customization of citation formatting.

• Introduces citationStyle as an optional string field on manuscripts.
• Enables downstream code to read and apply a user-specified citation style.

Comments suppressed due to low confidence (3)

src/schema/nodes/manuscript.ts:31

• Add a JSDoc comment above citationStyle explaining its purpose and listing expected style identifiers or format (e.g., CSL style keys).

citationStyle?: string

src/schema/nodes/manuscript.ts:31

• Consider defining an enum or union type for supported citation styles instead of a raw string to enforce valid values and improve type safety.

citationStyle?: string

src/schema/nodes/manuscript.ts:31

• Add unit or integration tests to verify that citationStyle is correctly serialized, stored, and applied when rendering citations.

citationStyle?: string