Added APIs for detecting multiple displays and setting windows on them. #5068

Job	Run time
Pre-commit checks / Pre-commit Checks	37s
Check towncrier / Towncrier Checks	35s
Python Package (android) / Create Python Package	58s
Python Package (cocoa) / Create Python Package	54s
Python Package (core) / Create Python Package	55s
Python Package (demo) / Create Python Package	1m 14s
Python Package (dummy) / Create Python Package	1m 9s
Python Package (gtk) / Create Python Package	1m 2s
Python Package (iOS) / Create Python Package	54s
Python Package (textual) / Create Python Package	1m 0s
Python Package (toga) / Create Python Package	1m 1s
Python Package (web) / Create Python Package	54s
Python Package (winforms) / Create Python Package	55s
core (macos, 3.8)	1m 0s
core (macos, 3.9)	1m 23s
core (macos, 3.10)	1m 18s
core (macos, 3.11)	1m 24s
core (macos, 3.12)	1m 41s
core (ubuntu, 3.8)	59s
core (ubuntu, 3.9)	39s
core (ubuntu, 3.10)	43s
core (ubuntu, 3.11)	42s
core (ubuntu, 3.12)	47s
core (windows, 3.8)	1m 22s
core (windows, 3.9)	1m 29s
core (windows, 3.10)	1m 30s
core (windows, 3.11)	1m 18s
core (windows, 3.12)	1m 38s
Combine & check core coverage.	30s
testbed (macOS)	3m 26s
testbed (windows)	3m 23s
testbed (linux)	3m 2s
testbed (android)	6m 44s
testbed (iOS)	6m 53s
	53m 59s

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