fix: 🐛 less ambigious plugin types (#4540)

Author: damusix

lib/types/plugin.d.ts

@@ -107,6 +107,17 @@ export interface PluginBase<T, D> {
     ___$type_of_plugin_decorations$___?: D;
 }
 
+/**
+ * A plugin that is registered by name and version.
+ */
+export interface NamedPlugin<T, D = void> extends PluginBase<T, D>, PluginNameVersion {}
+
+/**
+ * A plugin that is registered by its package.json file.
+ */
+export interface PackagedPlugin<T, D = void> extends PluginBase<T, D>, PluginPackage {}
+
+
 /**
  * Plugins provide a way to organize application code by splitting the server logic into smaller components. Each
  * plugin can manipulate the server through the standard server interface, but with the added ability to sandbox
@@ -116,7 +127,7 @@ export interface PluginBase<T, D> {
  *
  * The type T is the type of the plugin options.
  */
-export type Plugin<T, D = void> = PluginBase<T, D> & (PluginNameVersion | PluginPackage);
+export type Plugin<T, D = void> = NamedPlugin<T, D> | PackagedPlugin<T, D>;
 
 /**
  * The realm object contains sandboxed server settings specific to each plugin or authentication strategy. When registering a plugin or an authentication scheme, a server object reference is provided