could timeline item set detail timestamp, like 2020-01-01T01:00

[Colstuwjx]

As the title said, shall we support timestamp level item, rather than date time level. Thanks!

[azu]

Currently, parsing dates is limited. Probably, we can fix this function and resolve this issue. https://github.com/azu/mdline/blob/b0cff7aee4c04a9693f2544c19778a61eb15d51e/packages/mdline-parser/src/mdline-parser.ts#L17-L38