Add nestable terminal status utility #1648

Job	Run time
CLI responsiveness with latest Python	3m 30s
Downstream builds with Python 3.8	1m 2s
Downstream builds with Python 3.9	58s
Downstream builds with Python 3.10	49s
Downstream builds with Python 3.11	47s
Python 3.8 on Linux	3m 14s
Python 3.9 on Linux	4m 1s
Python 3.10 on Linux	3m 58s
Python 3.11 on Linux	4m 9s
Python pypy-3.9 on Linux	4m 59s
Python 3.8 on Windows	5m 0s
Python 3.9 on Windows	5m 30s
Python 3.10 on Windows	5m 51s
Python 3.11 on Windows	5m 21s
Python pypy-3.9 on Windows	13m 21s
Python 3.8 on macOS	3m 38s
Python 3.9 on macOS	7m 34s
Python 3.10 on macOS	3m 35s
Python 3.11 on macOS	3m 59s
Python pypy-3.9 on macOS	8m 35s
Report coverage	1m 0s
check	1s
	1h 30m 52s

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