Add render system

ecs/components.odin

@@ -0,0 +1,45 @@
+package ecs
+
+import sg "../sokol/gfx"
+
+Mat4 :: matrix[4, 4]f32
+
+Vec2 :: [2]f32
+Vec3 :: [3]f32
+Vec4 :: [4]f32
+
+Gravity :: struct {
+    force: Vec3 
+}
+
+RigidBody :: struct {
+    velocity: Vec3,
+    acceleration: Vec3,
+}
+
+Transform :: struct {
+    position: Vec3,
+    rotation: Vec3,
+    scale: Vec3,
+}
+
+Color :: struct {
+    color: Vec4,
+}
+
+Mesh :: struct {
+    vertex_buffer: sg.Buffer,
+    index_buffer: sg.Buffer,
+}
+
+Material :: struct {
+    shader: sg.Shader,
+    image: sg.Image,
+    sampler: sg.Sampler,
+}
+
+Camera :: struct {
+    position: Vec3,
+    target: Vec3,
+    look: Vec2
+}