Improve deployment CLI output for easier command copying

[strickvl]

This PR improves the UX of the deployment CLI output by making management commands easier to copy and paste into the terminal.

Changes

• Replaced the bordered Rich Table format with a simple list layout in the deployment management commands section
• Commands now appear on their own lines in bold green text
• Descriptions appear indented and dimmed below each command
• Removed table box-drawing characters that interfered with text selection

Motivation

The previous table format with rounded borders made it difficult to copy commands cleanly. When users tried to select commands to paste into their terminal, they would often end up selecting the box-drawing characters along with the command text, requiring manual cleanup.

Example Output

Before: Commands in a bordered table (hard to select)
After:

⚙️  Management Commands

zenml deployment logs weather_agent -f
  Follow deployment logs in real-time

zenml deployment describe weather_agent
  Show detailed deployment information

Testing

• Code formatting passed with bash scripts/format.sh
• Visual output can be tested by running any deployment command (e.g., zenml pipeline deploy)

[htahir1]

@strickvl note this might clash with #4121