Initial implementation of Cocoa and iOS font loading. #4062

Job	Run time
Pre-commit checks / Pre-commit Checks	45s
Check towncrier / Towncrier Checks	24s
Python Package (android) / Create Python Package	1m 7s
Python Package (cocoa) / Create Python Package	1m 1s
Python Package (core) / Create Python Package	1m 5s
Python Package (demo) / Create Python Package	58s
Python Package (dummy) / Create Python Package	1m 12s
Python Package (iOS) / Create Python Package	55s
Python Package (gtk) / Create Python Package	1m 10s
Python Package (textual) / Create Python Package	56s
Python Package (toga) / Create Python Package	1m 24s
Python Package (winforms) / Create Python Package	57s
Python Package (web) / Create Python Package	58s
core (macos, 3.8)	59s
core (macos, 3.9)	57s
core (macos, 3.10)	55s
core (macos, 3.11)	1m 3s
core (macos, 3.12-dev)	2m 23s
core (ubuntu, 3.8)	45s
core (ubuntu, 3.9)	47s
core (ubuntu, 3.10)	36s
core (ubuntu, 3.11)	54s
core (ubuntu, 3.12-dev)	1m 45s
core (windows, 3.8)	1m 25s
core (windows, 3.9)	1m 33s
core (windows, 3.10)	1m 31s
core (windows, 3.11)	1m 22s
core (windows, 3.12-dev)	3m 20s
Combine & check core coverage.	27s
testbed (macOS)	2m 29s
testbed (windows)	3m 34s
backend (android)	37s
testbed (linux)	2m 58s
backend (cocoa)	56s
backend (gtk)	1m 9s
backend (iOS)	47s
backend (web)	32s
testbed (android)	28m 11s
backend (winforms)	1m 21s
testbed (iOS)	6m 1s
	1h 22m 9s

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