feat: dynamic lights (#234)

* Initial draft of LightSource component

* Fixed conflicting ids

* Refactor structure

* Fixed ids

* Removed unused property and adjusted ids again

* Fixed color reference

* Fixed lowecase to oneof name

* Test to fix proto builds

* Renamed file to properly generate classes with the intended name

* Updated documentation

* Added cookie field

* Added missing import

* Fixed proper type reference

* Set optional properties, improved documentation

* Updated shadow mask type to TextureUnion

* Reordered properties to support different defaults on different messages

Author: AlejandroAlvarezMelucciDCL

proto/decentraland/sdk/components/light_source.proto

@@ -0,0 +1,35 @@
+syntax = "proto3";
+package decentraland.sdk.components;
+import "decentraland/sdk/components/common/id.proto";
+import "decentraland/common/colors.proto";
+import "decentraland/common/texture.proto";
+option (common.ecs_component_id) = 1079;
+
+message PBLightSource {
+  optional bool active = 4;                       // default = true, whether the lightSource is active or not.
+  optional decentraland.common.Color3 color = 1;  // default = Color.white, the tint of the light, in RGB format where each component is a floating point value with a range from 0 to 1.
+  optional float brightness = 2;                  // default = 250, ranges from 1 (dim) to 100,000 (very bright), expressed in Lumens for Point and Spot.
+  optional float range = 3;                       // default = 10, how far the light travels, expressed in meters.
+
+  oneof type {
+    Point point = 6;
+    Spot spot = 7;
+  }
+
+  message Point {
+    optional ShadowType shadow = 5; // default = ShadowType.ST_NONE The type of shadow the light source supports.
+  }
+
+  message Spot {
+    optional float inner_angle = 1;                                     // default = 21.8. Inner angle can't be higher than outer angle, otherwise will default to same value. Min value is 0. Max value is 179.
+    optional float outer_angle = 2;                                     // default = 30. Outer angle can't be lower than inner angle, otherwise will inner angle will be set to same value. Max value is 179.
+    optional ShadowType shadow = 5;                                     // default = ShadowType.ST_NONE The type of shadow the light source supports.
+    optional decentraland.common.TextureUnion shadow_mask_texture = 8;  // Texture mask through which shadows are cast to simulate caustics, soft shadows, and light shapes such as light entering from a window.
+  }
+
+  enum ShadowType {
+    ST_NONE = 0;  // No shadows are cast from this LightSource.
+    ST_SOFT = 1;  // More realistic type of shadow that reduces block artifacts, noise or pixelation, but requires more processing.
+    ST_HARD = 2;  // Less realistic type of shadow but more performant, uses hard edges.
+  }
+}