Add command line option to disable userPrompt tool

## Add command line option to disable userPrompt tool

### Description
Add a command line option that will disable the userPrompt tool for fully automated sessions. This option should default to true (enabling the userPrompt tool), but can be set to false to disable it.

### Use Case
This feature is needed for fully automated sessions where user interaction is not possible or desired.

### Implementation Details
1. Add a new `enableUserPrompt` option to the shared options in the CLI package
2. Pass this option to the agent context
3. Modify the tool loading logic to conditionally include or exclude the userPrompt tool based on this setting
4. Update documentation to reflect the new option

### Acceptance Criteria
- Command line option `--enableUserPrompt` is available and defaults to true
- When set to false, the userPrompt tool is disabled and not available to the agent
- Documentation is updated to reflect the new option

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Add command line option to disable userPrompt tool #164