add forcefield node (#75)

Co-authored-by: BuckarooBanzay <BuckarooBanzay@users.noreply.github.com>

forcefield.lua

@@ -0,0 +1,20 @@
+minetest.register_node("scifi_nodes:forcefield", {
+	description = "Forcefield",
+	sunlight_propagates = true,
+	drawtype = "glasslike",
+	groups = {},
+	paramtype = "light",
+	light_source = minetest.LIGHT_MAX,
+	diggable = false,
+	drop = '',
+	tiles = {{
+		name = "scifi_nodes_forcefield.png",
+		animation = {
+			type = "vertical_frames",
+			aspect_w = 16,
+			aspect_h = 16,
+			length = 1.0,
+		}
+	}},
+	on_blast = function() end,
+})