container: plugins: root: example: rename Example class

For clarity that this class is separate from plugin's entrypoint.

container/plugins/root/example/internal/example.hh

@@ -1,6 +1,6 @@
 // docker-finance | modern accounting for the power-user
 //
-// Copyright (C) 2024-2025 Aaron Fiore (Founder, Evergreen Crypto LLC)
+// Copyright (C) 2024-2026 Aaron Fiore (Founder, Evergreen Crypto LLC)
 //
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
@@ -37,7 +37,7 @@ namespace dfi::plugin::example
 //!
 //! \ingroup cpp_plugin_impl
 //! \since docker-finance 1.1.0
-class Example
+class MyExamples
 {
  public:
   //! \brief Example plugin function 1