Add the ability to test web apps #3525

Job	Run time
Python package / Create Python Package	59s
Pre-commit checks / Pre-commit Checks	51s
Check towncrier / Towncrier Checks	44s
Unit tests (macos, 3.8)	54s
Unit tests (macos, 3.9)	2m 14s
Unit tests (macos, 3.10)	1m 50s
Unit tests (macos, 3.11)	1m 36s
Unit tests (macos, 3.12)	2m 10s
Unit tests (ubuntu, 3.8)	37s
Unit tests (ubuntu, 3.9)	1m 29s
Unit tests (ubuntu, 3.10)	1m 10s
Unit tests (ubuntu, 3.11)	1m 29s
Unit tests (ubuntu, 3.12)	1m 59s
Unit tests (windows, 3.8)	1m 29s
Unit tests (windows, 3.9)	3m 11s
Unit tests (windows, 3.10)	2m 57s
Unit tests (windows, 3.11)	3m 47s
Unit tests (windows, 3.12)	3m 35s
Unit tests (windows, winstore3.12, false)	3m 11s
Project coverage	30s
Build app	0s
	36m 42s

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