fix: expand plugin aliases in Pod macro before escaping

[Jdyn]

Summary

• Fix double-escaping of plugin module aliases in Jido.Pod.__using__/1 by running expand_and_eval_literal_option on the user-supplied :plugins list before merging it into agent_opts

Problem

The Jido.Pod.__using__/1 macro correctly expands AST aliases for :name, :default_plugins, and :topology via Definition.expand_and_eval_literal_option, but the user-supplied :plugins list was passed through raw. When Macro.escape(agent_opts) runs inside the quote block, it double-escapes the {:__aliases__, meta, segments} tuples, so downstream code like Jido.Agent.__extract_plugin_module__/1 receives raw AST tuples instead of resolved module atoms.

# Before fix — raw AST alias tuples pass through Macro.escape:
agent_opts =
  opts
  |> Keyword.put(:plugins, pod_plugins ++ Keyword.get(opts, :plugins, []))
  #                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  #                        [{:__aliases__, meta, [:MyApp, :Intelligence, ...]}]

quote do
  use Jido.Agent, unquote(Macro.escape(agent_opts))
  #               ^^^ double-escapes the alias tuples
end

Fix

Expand user-supplied :plugins with expand_and_eval_literal_option (the same helper already used for :name, :default_plugins, and :topology) before concatenation:

user_plugins =
  Definition.expand_and_eval_literal_option(Keyword.get(opts, :plugins, []), __CALLER__)

agent_opts =
  opts
  |> Keyword.delete(:topology)
  |> Keyword.put(:plugins, pod_plugins ++ (user_plugins || []))