Feature: show current folder name in terminal title

[joycelu9087]

Issue #, if available:

Fixes #2723
Feature: Show current folder/project in the Terminal title

Description of changes:

• Added logic to make the terminal title for q chat show the current folder name.
• Added a helper function set_terminal_title_for_cwd() in crates/chat-cli/src/cli/chat/mod.rs.
• Called this helper at the start of ChatArgs::execute() so it runs when q chat starts.
• The title now displays as q (), for example q (ecommerce) instead of q (qchat).
• Skips emitting the escape sequence when stdout is not a TTY to avoid leaking characters into pipes.

Before:
All terminals were titled q (qchat), which made multiple sessions hard to tell apart.

After:
Each session shows its folder name in the title bar, e.g.:
q (amazon-q-developer-cli)

Testing

• Ran cargo run in different directories and confirmed the terminal title updates correctly.
• Confirmed behavior on macOS Terminal.
• Local tests all pass

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.