Mostly updates to Traceback rendering, to add support for features introduced in Python3.11

We also have a new env var that I am proposing to become a standard. TTY_COMPATIBLE=1 tells Rich to write ansi-escape sequences even if it detects it is not writing to a terminal. This is intended for use with GitHub Actions / CI, which can interpret escape sequences, but aren't a terminal.

There is also a change to how NO_COLOR and FORCE_COLOR are interpreted, which is the reason for the major version bump.

[14.0.0] - 2025-03-30

Added

• Added env var TTY_COMPATIBLE to override auto-detection of TTY support (See console.rst for details). #3675

Changed

• An empty NO_COLOR env var is now considered disabled. #3675
• An empty FORCE_COLOR env var is now considered disabled. #3675
• Rich tracebacks will now render notes on Python 3.11 onwards (added with Exception.add_note) #3676
• Indentation in exceptions won't be underlined #3678
• Rich tracebacks will now render Exception Groups #3677