add plugin hosts to seperate plugins from gloomi

This adds a plugin host that seperates plugins from the gloomi process,
allowing for plugins to be unloaded and loaded. This commit also has a
fair amount of other changes, nice to haves and bug fixes, some notable
changes are:
- Highly available reverse proxy from my Flux project
- Improved gloomi functionality

plugin/main.go

@@ -8,13 +8,9 @@ func (p *MyPlugin) Init() (*fiber.Config, error) {
 	return nil, nil
 }
 
-func (p *MyPlugin) Name() string {
-	return "MyPlugin"
-}
-
 func (p *MyPlugin) RegisterRoutes(router fiber.Router) {
 	router.Get("/", func(c fiber.Ctx) error {
-		return c.Status(fiber.StatusTeapot).SendString("Welcome to MyPlugin!")
+		return c.Status(fiber.StatusOK).SendString("Welcome to MyPlugin!")
 	})
 
 	router.Get("/hello", func(c fiber.Ctx) error {