Complete the half-built plugin slash command system. The dispatch code in cli.py and gateway/run.py already called get_plugin_command_handler() but the registration side was never implemented. Changes: - Add register_command() to PluginContext — stores handler, description, and plugin name; normalizes names; rejects conflicts with built-in commands - Add _plugin_commands dict to PluginManager - Add commands_registered tracking on LoadedPlugin - Add get_plugin_command_handler() and get_plugin_commands() module-level convenience functions - Fix commands.py to use actual plugin description in Telegram bot menu (was hardcoded 'Plugin command') - Add plugin commands to SlashCommandCompleter autocomplete - Show command count in /plugins display - 12 new tests covering registration, conflict detection, normalization, handler dispatch, and introspection Closes #10495
49 KiB
49 KiB