…ompt in sgpt/app.py, refactor lists in pyproject.toml"

This commit introduces the 'tiktoken' dependency in the pyproject.toml file and adds functionality to calculate the number of tokens for a given prompt in the sgpt/app.py file. This is done by adding a new 'tokenize' option in the main function.

…ate dependencies"

…p.py"

…g tiktoken as a dependency

   - Changed the working directory and copy destination to /home/app for better organization and to follow best practices.
   - Added a step to create a new user 'app' and switch to it for security reasons, as running the Docker container as root can be a security risk.

2. sgpt/__init__.py:
   - Imported Optional from typing to support optional typing in the code, improving code readability and maintainability.

3. sgpt/app.py:
   - Imported rich library and typing for better console output formatting and type hinting.
   - Replaced typer.echo with rich.print for better console output formatting.
   - Removed a comment that was not providing any additional information.

4. sgpt/config.py:
   - Imported Console from rich for better console output formatting.
   - Added a new configuration variable 'FORCE_COLOR' to allow users to force color output in the console.
   - Added a method to initialize a Console object with the appropriate color system based on the 'FORCE_COLOR' configuration variable.

5. sgpt/role.py:
   - Imported print from rich for better console output formatting.
   - Replaced typer.echo with rich.print for better console output formatting.

6. sgpt/utils.py:
   - Imported print from rich for better console output formatting.
   - Replaced typer.echo with rich.print for better console output formatting.