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feat: add IUserFolder similar to IRootFolder #8619

Job	Run time
gate	8s
Playwright setup	2m 25s
Playwright tests for installer	8m 20s
Playwright tests 6 / 8	10m 3s
Playwright tests 5 / 8	7m 50s
Playwright tests 4 / 8	10m 5s
Playwright tests 1 / 8	7m 26s
Playwright tests 2 / 8	9m 53s
Playwright tests 3 / 8	8m 54s
Playwright tests 8 / 8	8m 46s
Playwright tests 7 / 8	9m 49s
merge-reports	1m 27s
playwright-test-summary	5s
	1h 25m 11s