fix(examples): replace unsafe eval in title.sh with safe read block

[AbhiPra24]

Summary of Changes

• Replaced the unsafe eval $(echo "$DATA" | jq ...) pattern in examples/title/title.sh with a safe multi-line read -r block.
• Prevents potential shell command injection if untrusted or malformed directory paths/metadata are passed in the JSON payload.
• Aligns with the robust parsing pattern used in examples/statusline/statusline.sh.

Verification

• Executed examples/title/title.sh against simulated agent JSON payloads ({"agent_state": "working", "workspace": {"current_dir": "/path/to/project"}}).
• Verified expected clean emoji and workspace title generation without shell evaluation vulnerabilities.

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.