argdeco

Create a versatile command-line tool using Python that allows users to manage their personal notes. This tool will be called 'NoteMaster'. It should utilize the 'argdeco' package to define and handle command-line arguments for various functionalities. Here’s how you would approach building this tool:

1. **Setup**: Start by installing the necessary packages including 'argdeco'. Ensure your environment is set up correctly.
2. **Functionality Overview**:
   - Add new notes with a title and content.
   - List all titles of notes.
   - View the content of a specific note by its title.
   - Delete a note by its title.
3. **Utilizing 'argdeco'**:
   - Use decorators provided by 'argdeco' to define command-line arguments for each functionality. For example, use decorators to specify which argument is required for adding a note (title and content), viewing a note (title), etc.
4. **Features**:
   - Support for multiple notes.
   - Persistent storage of notes using a local file system or SQLite database.
   - Option to search notes by keywords within the content.
   - Ability to edit existing notes.
5. **Implementation Details**:
   - Implement a simple text-based user interface that lists available commands and prompts for input.
   - Use 'argdeco' decorators to parse command-line inputs effectively.
   - Handle errors gracefully, such as when a user tries to view or delete a non-existent note.
6. **Testing**:
   - Write tests to ensure that each feature works as expected, including edge cases like empty inputs or invalid commands.
7. **Documentation**:
   - Provide clear documentation on how to install and use NoteMaster, including examples of valid command-line inputs.

Your task is to design and implement NoteMaster, showcasing the power and flexibility of 'argdeco' in managing command-line interfaces for complex applications.