Agent: Support timeout for terminal tool calls

Summary <!-- Please insert a one line summary of the issue below --> When AI uses terminal tool to run a command, that never ends (e.g. running a test command that is in watch mode by default), it hangs indefinitely. Description <!-- Describe with sufficient detail to reproduce from a clean Zed install. --> Steps to trigger the problem: 1. Prepare a command that would not terminate for long time, e.g. create bash script do-something.sh with sleep infinity 2. Ask agent to run do-something.sh 3. Check that agent started the command in the agent's terminal Actual Behavior: Agent gets stuck forever waiting for the terminal command to exit Expected Behavior: Agent should detect infinite command and terminate it after some timeout. Perhaps agent should be able to define expected timeout for the command. Model Provider Details • Provider: Github Copilot with • Model Name: Antropic Claude Sonnet 3.7 • Mode: Agent Panel • MCP Servers in-use: NA &…