Expose HTTP factories in DI

[GitHamo]

This change exposes the HTTP-related factories through the dependency injection system by registering them in the $implement map during component initialization.

Note: This change is only in trunk (for now), but could be picked up in other branches if someone needs such a dependency in earlier versions.

Motivation

This improves consistency with the DI architecture, enables easier substitution and testing, and avoids eager instantiation.

What changed

The following factories are now registered in the DI container:

• CookieFactory → CookieFactoryImpl
• CookieJarFactory → CookieJarFactoryImpl
• RequestFactory → RequestFactoryImpl
• ResponseFactory → ResponseFactoryImpl

Scope and impact

• No behavioral changes to existing consumers.
• No runtime logic added beyond DI registration.
• Existing code can now depend directly on the factory interfaces via DI.