Ruby

Add `todo` type #3923

Job	Run time
windows (windows-2019, ucrt)	1m 0s
test (master-nightly-focal, test)	2m 32s
windows (windows-2019, mswin)	1m 36s
test (master-nightly-focal, stdlib_test)	3m 4s
windows (windows-2022, ucrt)	1m 24s
test (master-nightly-focal, rubocop validate test_doc build test_generate_stdlib)	3m 35s
windows (windows-2022, mswin)	1m 8s
test (master-nightly-focal, lexer confirm_lexer)	4m 32s
test (master-nightly-focal, lexer compile)	5m 1s
test (3.2-dev-focal, test)	2m 12s
test (3.2-dev-focal, stdlib_test)	2m 26s
test (3.2-dev-focal, rubocop validate test_doc build test_generate_stdlib)	2m 28s
test (3.2-dev-focal, lexer confirm_lexer)	5m 35s
test (3.2-dev-focal, lexer compile)	4m 3s
test (3.1-dev-focal, test)	2m 21s
test (3.1-dev-focal, rubocop validate test_doc build test_generate_stdlib)	2m 26s
test (3.1-dev-focal, lexer confirm_lexer)	5m 9s
test (3.1-dev-focal, lexer compile)	4m 52s
test (3.0-dev-focal, test)	3m 3s
test (3.0-dev-focal, rubocop validate test_doc build test_generate_stdlib)	2m 25s
test (3.0-dev-focal, lexer confirm_lexer)	4m 12s
test (3.0-dev-focal, lexer compile)	4m 4s
	1h 9m 8s

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