Added Dialogic and a test dialog

addons/dialogic/Modules/Background/Transitions/push_transition_shader.gdshader

@@ -0,0 +1,17 @@
+shader_type canvas_item;
+
+uniform vec2 final_offset = vec2(0,-1);
+uniform float progress: hint_range(0.0, 1.0);
+uniform sampler2D previous_background: source_color, hint_default_transparent;
+uniform sampler2D next_background: source_color, hint_default_transparent;
+
+
+void fragment() {
+	vec2 uv = UV + final_offset * progress*vec2(-1, -1);
+
+	if (uv.x < 1.0 && uv.x > 0.0 && uv.y < 1.0 && uv.y > 0.0){
+		COLOR = texture(previous_background, uv, 1);
+	} else {
+		COLOR = texture(next_background, uv-final_offset*vec2(-1,-1));
+	}
+}