feat: water rendering (#13)

* refactor: update water texture

* feat(gameplay): implement transparent block rendering with depth sorting

* fix(world): use camera pos for distance calculations, make water passable

* refactor(player): use ivec3 for block pass check

* feat(camera): add underwater detection

* feat(renderer): add underwater effect with framebuffer post-processing

* feat(block): add gas property and refactor solid block check

* fix(assets): set leaf block transparency to false

* fix(block): set leaf as transparent

src/app.cpp

@@ -257,6 +257,7 @@ void App::update() {
             m_renderer.update_fov(fov + 5.0f);
         }
     }
+    m_renderer.update(delta_time);
 }
 
 int App::start_cubed_application(int argc, char** argv) {