Implement SaveScreenshot and CopyScreenshot action #7355

Job	Run time
Check C++ style	25s
Archlinux ${{ matrix.arch }}	0s
Check clang-tidy	24m 9s
Check CI scripts	2s
Check links	11s
Check PR-TODOs	5s
Check editorconfig	7s
Fedora 40 linux/amd64 x86_64	11m 6s
Static build	0s
FreeBSD 13	0s
macOSArm	7m 41s
macOSx86	0s
OpenBSD 7.5	0s
Packaging for AppImage	11m 50s
Packaging for Ubuntu 24.04	5m 3s
Ubuntu Linux 24.04 (GCC 14, C++20, Qt6)	5m 14s
Ubuntu Linux 24.04 (Clang 18, C++20, Qt6)	4m 39s
Windows	14m 50s
Check Release	0s
Check packages for Ubuntu (24.04)	33s
GUI: Quick Shell Exit (24.04)	57s
GUI: notcurses-demo aanimate-box-chunli-dragon-eagle-fission-grid-highcon	5m 52s
GUI: notcurses-demo intro-junle-keller-luigi-mojibake-normal-outro-qrcode	2m 21s
GUI: notcurses-demo reel-sliders-trans-uniblock-view-whiteout-xray-yield-zoo	5m 53s
Run bench-headless (grid cat)	55s
Run tests via valgrind	43s
Run bench-headless (grid long)	56s
Ubuntu Linux 24.04 post-check	3s
tests matrix	1s
Create Github release	0s
	1h 43m 36s

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