Introducing performance optimizations and TypeScript Types

[jkyberneees]

No description provided.

[Copilot]

Pull Request Overview

This PR introduces significant performance optimizations and TypeScript type definitions to the middleware-if-unless package. The changes focus on reducing memory allocations and improving runtime efficiency through caching mechanisms.

• Implements router caching with WeakMap to reuse router instances across similar configurations
• Optimizes handler creation to minimize function allocations during request processing
• Adds TypeScript type definitions and updates package dependencies

Reviewed Changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 2 comments.

File	Description
package.json	Adds TypeScript definitions file, updates dependencies to newer versions, and includes index.d.ts in published files
index.js	Implements performance optimizations including router caching, optimized handler creation, and streamlined execution logic

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