- Add `defineCommand` function to validate and normalize command inputs.
- Introduce `deployApplicationCommands` for deploying slash commands to Discord.
- Create `CommandRegistry` class for managing command registration and retrieval.
- Implement `buildSlashPayload` to construct slash command payloads with localization support.
- Add usage utilities for prefix and slash commands.
- Develop `CommandExecutor` to handle command execution with permission checks and cooldown management.
- Create member message rendering service for welcome and leave messages with customizable templates.
- Introduce presence template variables for dynamic bot status updates.
- Implement template variable utilities for rendering and extracting variables from strings.