2D Renderer introduced

[denyskryvytskyi]

• [x] Shader Manager (shader files loading)
• [x] VAO, VBO, EBO API abstraction
• [x] Shader, Texture abstraction
• [x] orthographic camera
• [ ] 2D Renderer
  • [x] Quad
  • [x] Sprites
  • [x] Quads and sprites batching
  • [ ] Circle and line