chore: Add workspace proxy enterprise cli commands (#7176)

* feat: Add workspace proxy enterprise cli commands
* chore: Handle custom workspace proxy options. Remove excess
* chore: Add endpoint to register workspace proxies

cli/clibase/option.go

@@ -80,6 +80,17 @@ func (s *OptionSet) Add(opts ...Option) {
 	*s = append(*s, opts...)
 }
 
+// Filter will only return options that match the given filter. (return true)
+func (s OptionSet) Filter(filter func(opt Option) bool) OptionSet {
+	cpy := make(OptionSet, 0)
+	for _, opt := range s {
+		if filter(opt) {
+			cpy = append(cpy, opt)
+		}
+	}
+	return cpy
+}
+
 // FlagSet returns a pflag.FlagSet for the OptionSet.
 func (s *OptionSet) FlagSet() *pflag.FlagSet {
 	if s == nil {