Opt-depend on all mods (#58)

* move "dye" to optional depends and disable recipes if default or dye are not available
* replace default.LIGHT_MAX with minetest.LIGHT_MAX
* add sound-switch and use default if available
* enable crate and builder only if default mod is available
* move default mod to opt-depends and use screwdriver only if available

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

sounds.lua

@@ -0,0 +1,29 @@
+-- sound definitions
+
+function scifi_nodes.node_sound_wood_defaults()
+    if minetest.get_modpath("default") then
+        -- default game
+        return default.node_sound_wood_defaults()
+    end
+end
+
+function scifi_nodes.node_sound_glass_defaults()
+    if minetest.get_modpath("default") then
+        -- default game
+        return default.node_sound_glass_defaults()
+    end
+end
+
+function scifi_nodes.node_sound_metal_defaults()
+    if minetest.get_modpath("default") then
+        -- default game
+        return default.node_sound_metal_defaults()
+    end
+end
+
+function scifi_nodes.node_sound_stone_defaults()
+    if minetest.get_modpath("default") then
+        -- default game
+        return default.node_sound_stone_defaults()
+    end
+end