v0.5.3

Fixed

• Resolve the bundled MCP server via ${CLAUDE_PLUGIN_ROOT}/bin/1nt instead of a
  bare 1nt command. Plugin hosts spawn the stdio MCP server without the plugin's
  bin/ on PATH, so the bare name failed with "Executable not found in $PATH".

Changed

• Refresh transitive dependencies via cargo update (drops the duplicate
  thiserror 1.x and the stale windows-sys 0.45 backend).