Add verbosity control option to reduce tool execution traces

## Current Behavior
Q CLI shows detailed tool execution traces (like "🛠️ Using tool: execute_bash") for transparency, but there's no way to reduce this output for users who prefer cleaner results.

## Expected Behavior
Provide a setting or command-line option to control verbosity of tool execution traces, allowing users to see only results without detailed execution steps.

## Steps to Reproduce
1. Run any Q CLI command that uses tools
2. Observe detailed trace output showing each tool execution step
3. Note there's no setting to reduce this verbosity

## Use Case
Users who want to focus on results rather than implementation details would benefit from a `--quiet` mode or similar verbosity control.