feat: mcp server first take

lib/mix/tasks/bds.mcp.ex

@@ -0,0 +1,25 @@
+defmodule Mix.Tasks.Bds.Mcp do
+  @moduledoc false
+
+  use Mix.Task
+
+  @shortdoc "Runs the bDS MCP server over stdio or localhost HTTP"
+
+  @impl Mix.Task
+  def run(args) do
+    Mix.Task.run("app.start")
+
+    case args do
+      ["--http", port] ->
+        {:ok, _server} = BDS.MCP.Server.start(String.to_integer(port))
+        Process.sleep(:infinity)
+
+      ["--http"] ->
+        {:ok, _server} = BDS.MCP.Server.start(0)
+        Process.sleep(:infinity)
+
+      _other ->
+        BDS.MCP.Stdio.main()
+    end
+  end
+end