[FEATURE]: DI container for controllers

[NikSimDev]

Feature Category

Developer experience

Problem Statement

Currently, controllers are created manually:

auto userController = std::make_shared<UserController>();

This does not scale well.

Proposed Solution

Add a simple DI:

• singleton registry
• scoped services
• auto‑wiring through templates

API Design

Alternative Solutions

No response

Use Case

No response

Impact and Scope

No response

Contribution

• I would like to implement this feature
• I need guidance on implementation
• I can help with testing