Add basic support for license expressions #310

Job	Run time
test_windows (net6.0)	7m 46s
test_windows (net7.0)	7m 52s
check_code_format	55s
check_licenses_net472 (App)	4m 37s
test_windows (net8.0)	6m 11s
check_licenses_net472 (Tests)	2m 55s
check_version_command (net6.0)	48s
test_windows (net472)	6m 10s
check_licenses_net472 (ProjectWithReferenceContainingLicenseExpression)	2m 47s
check_licenses (net6.0, App)	46s
check_version_command (net7.0)	43s
check_licenses (net6.0, Tests)	2m 28s
check_version_command_net472	2m 42s
check_version_command (net8.0)	37s
check_licenses (net6.0, ProjectWithReferenceContainingLicenseExpression)	2m 20s
test (ubuntu-latest, net6.0)	1m 15s
check_licenses (net7.0, App)	49s
test (ubuntu-latest, net7.0)	1m 14s
check_licenses (net7.0, Tests)	32s
test (ubuntu-latest, net8.0)	1m 4s
check_licenses (net7.0, ProjectWithReferenceContainingLicenseExpression)	2m 8s
test (macos-latest, net6.0)	1m 32s
check_licenses (net8.0, App)	45s
test (macos-latest, net7.0)	1m 56s
check_licenses (net8.0, Tests)	39s
test (macos-latest, net8.0)	1m 50s
check_licenses (net8.0, ProjectWithReferenceContainingLicenseExpression)	2m 8s
	1h 5m 29s

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