[Feature request] Add more formats for the input

[Foxeye-Rinx]

Hi, thank for the lovely library. I love it so much. Is there any way to add more formats for the input?

I got that format on the moment's doc

[probablykasper]

Would happily accept a PR for it

[Razunter]

Also there is currently no support for single digit hours, only two digits.

[Wtower]

I added several options in parse.ts, but this does not seem to work: When entering any value, the date picker presents the format as value. For example, if I specify as format d/M/yy, it displays this exact format rather than the value.

I am not familiar with the code of this component and have a trouble understanding its logic. If someone can point me to some direction that would be great, otherwise it is a dead end for my attempt to solve this.

[probablykasper]

There's two parts to it, createFormat() which parses the format into FormatToken[], and parse() which parses dates using the FormatToken[]s.

I'm not sure how variable-length format tokens should be handled. How would yymd parse 23111 - 23-11-1 or 23-1-11?

[probablykasper]

About the parsing of yymd, I'd be ok with calling it undefined behavior and parsing it however is easiest (which is probably 23111 -> 23-11-1)