bot: support plugins names with multiples words

edmond/bot.py

@@ -77,7 +77,11 @@ class Bot(irc.client.SimpleIRCClient, Logger):
             if not are_dependencies_ok:
                 self.log_e(f"Dependencies not found for plugin {plugin_name}.")
                 continue
-            class_name = plugin_name.capitalize() + "Plugin"
+            # Get plugin class name from its module name.
+            class_name = "".join(map(
+                lambda w: w.capitalize(),
+                plugin_name.split("_")
+            )) + "Plugin"
             plugin_class = getattr(module, class_name)
             self.plugins.append(plugin_class(self))
             self.values[plugin_name] = {}