Parent Issue

Closes #406

Summary

Implement the http2_request structure to represent incoming HTTP/2 requests.

Tasks

• Create include/kcenon/network/protocols/http2/http2_request.h
• Implement http2_request struct with method, path, authority, scheme, headers, body
• Add helper methods (get_header, content_type, content_length)

Files to Create

• include/kcenon/network/protocols/http2/http2_request.h

Acceptance Criteria

• All pseudo-headers parsed correctly (:method, :path, :authority, :scheme)
• Helper methods work correctly
• Unit tests pass