Update CONTRIBUTING.md with template

CONTRIBUTING.md

@@ -16,6 +16,41 @@ Additionally, every command should be implemented in its own file. This helps ke
 
 Don't forget to update `init.lua` to `dofile()` the new file(s) you create in each submod :-)
 
+## Chat command template
+
+```lua
+-- ███    ██  █████  ███    ███ ███████
+-- ████   ██ ██   ██ ████  ████ ██
+-- ██ ██  ██ ███████ ██ ████ ██ █████
+-- ██  ██ ██ ██   ██ ██  ██  ██ ██
+-- ██   ████ ██   ██ ██      ██ ███████
+local wea = worldeditadditions
+worldedit.register_command("{name}", {
+	params = "<argument> <argument=default> <option1|option2|...> [<optional_argument> <optional_argument2> ...] | [<optional_argument> [<optional_argument2>]]",
+	description = "A **brief** description of what this command does",
+	privs = { worldedit = true },
+	require_pos = 0, -- Optional | (0|1|2)
+	parse = function(params_text)
+		-- Do stuff with params_text
+		return true, param1, param2
+	end,
+	nodes_needed = function(name) --Optional
+		return worldedit.volume(worldedit.pos1[name], worldedit.pos2[name])
+	end,
+	func = function(name, param1, param2)
+		-- Start a timer
+		local start_time = wea.get_ms_time()
+		-- Do stuff
+		
+		-- Finish timer
+		local time_taken = wea.get_ms_time() - start_time
+		
+		minetest.log("This is a logged message!")
+		return true, "Completed command in " .. wea.format.human_time(time_taken)
+	end
+})
+```
+
 
 ## Guidelines
 When actually implementing stuff, here are a few guidelines that I recommend to summarise everything:

README.md

@@ -140,6 +140,8 @@ Contributions are welcome! Please state in your pull request(s) that you release
 
 Please also make sure that the logic for every new command has it's own file. For example, the logic for `//floodfill` goes in `worldeditadditions/floodfill.lua`, the logic for `//overlay` goes in `worldeditadditions/overlay.lua`, etc. More contributing help can be found in [the contributing guide](./Contributing.md)
 
+For more information check out [CONTRIBUTING.md](CONTRIBUTING.md).
+
 I, Starbeamrainbowlabs (@sbrl), have the ultimate final say.