Fix click-to-focus with multiple terminal windows

Match the correct terminal window by working directory instead of
grabbing the frontmost window. Uses CGWindowListCopyWindowInfo to find
windows whose title contains the cwd, then raises the specific window
via AppleScript AXRaise on click. Falls back to app-level activation
when no match is found.

Also switches from `open -b` to NSRunningApplication.activate() and
bumps version to 1.1.0.

Fix GitHub username in README

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>