feat: add compatibility validation between runtimes and frameworks

[marcosgdz03]

Context

Currently, users can generate projects without validation of version compatibility.

Goal

Prevent invalid combinations of runtimes and frameworks.

Examples

• Node 16 + Next.js latest ❌
• Java 8 + Spring Boot 3 ❌

Functional Requirements

• Validate:
  • runtime ↔ framework
  • framework ↔ version
• Show warnings or block invalid setups

Technical Approach

• Rule-based system (JSON or config)
• Easily updatable without code changes

Acceptance Criteria

• Invalid combinations are detected
• User receives clear feedback
• System is extensible