Sidebuf displays a persistent, sorted buffer list in a side
window.  It provides a simple, zero-dependency alternative to
heavier buffer management packages.

Features:
 - Flat, sorted buffer list pinned to the left or right side
 - Alphabetical or most-recent sort order
 - Pin buffers to the top of the list
 - Toggle visibility of *special* and hidden buffers
 - Active-buffer tracking with fringe indicator
 - Smart window reuse when selecting buffers
 - Modified-buffer indicators
 - Kill buffers without leaving the sidebar

Usage:
  M-x sidebuf-toggle    Open or close the panel
  M-x sidebuf-open      Open the panel
  M-x sidebuf-close     Close the panel

Press ? inside the panel to see all keybindings.