More work on implementing quests and tech trees

shaders/glowing_line.gdshader

@@ -0,0 +1,13 @@
+// NOTE: Shader automatically converted from Godot Engine 4.5.1.stable.mono's CanvasItemMaterial.
+
+shader_type canvas_item;
+render_mode blend_mix;
+uniform sampler2D main_texture;
+
+void vertex() {
+}
+
+void fragment() {
+	vec4 col = texture(main_texture, UV);
+	COLOR = col;
+}

shaders/glowing_line.gdshader.uid

@@ -0,0 +1 @@
+uid://cm3u77icj5agh