perf: move read options outside parser middlewares

[Phillip9587]

Move options object creation outside the returned parser middlewares to avoid recreating objects on every request.

[Copilot]

Pull Request Overview

This PR implements a performance optimization by moving options object creation outside the returned parser middleware functions to avoid recreating objects on every request.

• Extracts readOptions object creation from inside the middleware functions to the outer scope
• Updates variable declarations from var to const for consistency
• Applies the optimization consistently across all four parser types (json, urlencoded, text, raw)

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
lib/types/json.js	Moves readOptions object creation outside jsonParser middleware and updates var to const
lib/types/urlencoded.js	Moves readOptions object creation outside urlencodedParser middleware and updates var to const
lib/types/text.js	Updates variable declaration from var to const (no readOptions extraction needed)
lib/types/raw.js	Moves readOptions object creation outside rawParser middleware and updates var to const

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