Add option to suppress 'Shell cwd was reset' messages

Description

When running Bash commands in directories outside the project root, Claude Code prints an informational message after each command output:

Shell cwd was reset to /home/user/.claude

This becomes noisy in sessions with many cross-directory operations (e.g., working on multiple repositories from a central config repo).

Current Behavior

Every Bash command that executes outside the project directory produces this message in the output, regardless of user preference.

Requested Enhancement

Add a setting to suppress these informational messages while preserving the underlying reset behavior. Options could include:

• Environment variable: CLAUDE_BASH_QUIET_CWD=1
• Or settings.json option: "bashQuietCwdReset": true

Rationale

• The reset behavior itself is correct and useful
• The message is informational but not actionable by the user
• Users who understand the shell model don't need this reminder on every command
• Reduces output noise and improves readability of command results

Environment

• Claude Code version: 1.0.33
• Platform: Linux (Ubuntu)