chore,gd: refactored project structure and started the mantle system

player_controller/Shaders/Vignette.gdshader

@@ -0,0 +1,10 @@
+shader_type canvas_item;
+
+uniform vec4 color : source_color;
+uniform float multiplier = 0.2;
+uniform float softness = 3.0;
+
+void fragment() {
+	float distance_to_center = distance(UV, vec2(0.5));
+	COLOR = vec4(color.rgb, smoothstep(multiplier, softness, distance_to_center));
+}