Support for custom image format plugins #5152

Job	Run time
Pre-commit checks / Pre-commit Checks	39s
Check towncrier / Towncrier Checks	46s
Python Package (core) / Create Python Package	55s
Python Package (cocoa) / Create Python Package	50s
Python Package (android) / Create Python Package	58s
Python Package (demo) / Create Python Package	1m 0s
Python Package (dummy) / Create Python Package	57s
Python Package (iOS) / Create Python Package	1m 3s
Python Package (gtk) / Create Python Package	49s
Python Package (textual) / Create Python Package	55s
Python Package (toga) / Create Python Package	53s
Python Package (web) / Create Python Package	54s
Python Package (winforms) / Create Python Package	57s
core (macos, 3.8)	1m 27s
core (macos, 3.9)	58s
core (macos, 3.10)	57s
core (macos, 3.11)	55s
core (macos, 3.12)	1m 13s
core (ubuntu, 3.8)	47s
core (ubuntu, 3.9)	47s
core (ubuntu, 3.10)	44s
core (ubuntu, 3.11)	41s
core (ubuntu, 3.12)	46s
core (windows, 3.8)	1m 24s
core (windows, 3.9)	1m 21s
core (windows, 3.10)	1m 30s
core (windows, 3.11)	1m 11s
core (windows, 3.12)	1m 42s
Combine & check core coverage.	26s
testbed (macOS)	4m 38s
testbed (windows)	4m 13s
testbed (linux)	3m 0s
testbed (android)	6m 45s
testbed (iOS)	8m 54s
	55m 55s

Provide feedback