chore(index): replace any type with union of poppler func typedefs

[Fdawgs]

Improves type safety and enables better IntelliSense/autocomplete in VS Code et al.

Checklist

• Run npm test
• Commit message adheres to the Conventional commits style, following the @commitlint/config-conventional config

[Copilot]

Pull request overview

This PR improves type safety in the parseOptions function by replacing the generic Record<string, any> type with a union of all specific Poppler function option types. This change enables better IntelliSense/autocomplete support in IDEs like VS Code by providing explicit type information for the options parameter.

Changes:

• Replaced Record<string, any> with union of 12 specific option typedefs for the options parameter in parseOptions function JSDoc

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