Migrate DevSettings to PluginSettings for much better config flow (#572)

* Add the devsetting config options into settings

* Create dropdown component and add setting controls

* Static dropdwon width and spin arrow

* Improve dropdown option contrast and border

* Forgot to make the settings page respect the static spacing, oops

* Smaller arrow

* Vert padding

* Reset option for settings

* Hide reset button when on default

* Respect the logLevel setting

* Portal settings out to external typechecking module

* Implement new configs using the new singleton Settings

* Remove DevSettings

* Update test runner to use new settings

* More helpful test failure output

* Support non-plugin environment

* Migrate dropdown to new packages system

* Clean up components a tad

plugin/src/init.spec.lua

@@ -2,7 +2,10 @@ return function()
 	it("should load all submodules", function()
 		local function loadRecursive(container)
 			if container:IsA("ModuleScript") and not container.Name:find("%.spec$") then
-				require(container)
+				local success, err = pcall(require, container)
+				if not success then
+					error(string.format("Failed to load '%s': %s", container.Name, err))
+				end
 			end
 
 			for _, child in ipairs(container:GetChildren()) do
@@ -12,4 +15,4 @@ return function()
 
 		loadRecursive(script.Parent)
 	end)
-end
+end