chore(auth): add email otp mfa enums and types #3672

Job	Run time
test / test-dart-vm (3.3.0)	2m 26s
test / test-dart-vm (stable)	2m 5s
native_test / test-dart-native (macos-14)	1m 52s
ddc_test / test-dart-ddc (3.3.0, chrome)	3m 37s
native_test / test-dart-native (windows-latest)	3m 18s
dart2js_test / test-dart-2js (3.3.0, chrome)	4m 16s
ddc_test / test-dart-ddc (3.3.0, firefox)	3m 49s
dart2js_test / test-dart-2js (3.3.0, firefox)	4m 17s
ddc_test / test-dart-ddc (stable, chrome)	3m 27s
dart2js_test / test-dart-2js (stable, chrome)	4m 52s
ddc_test / test-dart-ddc (stable, firefox)	4m 3s
dart2js_test / test-dart-2js (stable, firefox)	4m 12s
	42m 14s

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