import ScreenOverlay in init.py for overlay functionality #1721

Job	Run time
cpython (3.8)	13s
cpython-lxml (3.8)	3m 11s
Build & inspect our package.	23s
cpython-lxml (3.9)	3m 34s
doctest-lxml (3.12)	40s
cpython-lxml (3.10)	3m 44s
cpython (3.9)	16s
pypy (pypy-3.8)	31s
cpython (3.10)	15s
cpython-lxml (3.11)	4m 6s
pypy (pypy-3.9)	29s
static-tests (3.12)	38s
cpython (3.11)	11s
cpython-lxml (3.12)	5m 7s
pypy (pypy-3.10)	34s
cpython (3.12)	14s
cpython-lxml (3.13)	5m 27s
cpython (3.13)	21s
cpython (3.14-dev)	24s
Publish to PyPI on push to main	0s
Test install on TestPyPI	0s
	30m 18s

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