Add new scripts and machinery to make working on plugin easier

plugin/src/Config.lua

@@ -1,8 +1,13 @@
-return {
+local strict = require(script.Parent.strict)
+
+local isDevBuild = script.Parent.Parent:FindFirstChild("ROJO_DEV_BUILD") ~= nil
+
+return strict("Config", {
+	isDevBuild = isDevBuild,
 	codename = "Epiphany",
 	version = {0, 6, 0, "-dev"},
 	expectedServerVersionString = "0.6.0 or newer",
 	protocolVersion = 3,
 	defaultHost = "localhost",
 	defaultPort = 34872,
-}
+})