Refactor help plugin, and included metadata to all plugins

plugins/config.py

@@ -152,3 +152,25 @@ async def handle_command(room, message, bot, prefix, config):
         config.admin_user = ""
         config.prefix = "!"
         await bot.api.send_text_message(room.room_id, "Configuration reset")
+
+
+# ---------------------------------------------------------------------------
+# Plugin Metadata
+# ---------------------------------------------------------------------------
+
+__version__ = "1.0.0"
+__author__ = "Funguy Bot"
+__description__ = "Admin configuration commands"
+__help__ = """
+<details>
+<summary><strong>Admin Config</strong> (!set, !get, !saveconf, …)</summary>
+<ul>
+<li><code>!set &lt;option&gt; &lt;value&gt;</code> – Set admin_user/prefix</li>
+<li><code>!get &lt;option&gt;</code> – Display config value</li>
+<li><code>!show</code> – Show current settings</li>
+<li><code>!saveconf</code> / <code>!loadconf</code> – Save/load config</li>
+<li><code>!rehash</code> – Reload configuration</li>
+</ul>
+<p>Admin only.</p>
+</details>
+"""