feat: quiet mode for CLI runs

[vaporwavie]

Fixes: #6999

This PR adds the -q | --quiet argument, which aims to provide a cleaner output to the user for CLI runs, suppressing tool calls and focusing on the actual response from the agent.

Usage

# shorthand
opencode run -q "list the files in this directory"

# verbalized
opencode run --quiet "list the files in this directory"

# specifying a model
opencode run -m "opencode/gemini-3-flash" "list the files in this directory" --quiet

# wrapped around a function
function ask() {
  if [ -z "$1" ]; then
    echo "Usage: ask <question>"
    return 1
  fi

  local model="opencode/gemini-3-flash"
  opencode run -m $model "$*" -q | glow -
}

Demo

Dry Run

https://github.com/user-attachments/assets/41c96313-343a-416b-8e63-6665b0695aaa

Scenario	Preview
Before
After