feat: milliseconds support

[Aditya-ds-1806]

This is an initial draft PR for the millisecond feature #1361. Would love to get your feedback on this up to this point.

[mvorisek]

@Aditya-ds-1806 as discussed in #1361 (comment) and #2520 (comment) at least nanosecond resolution should be supported, this PR should aim to provide general "fractional seconds" support

[Aditya-ds-1806]

Got it, so you want me to increase the precision to 9 and preferably users should be able to configure it. Will try to push the changes in a few hours!

[Aditya-ds-1806]

are the input elements configured to display a maximum of 4 digits somewhere? input.value.length doesnt go beyond 4 at all for some reason @mvorisek

[mvorisek]

4 digits? If you can get beyond 3 digits it should be not because of Date having only 3 digits/milli resolution - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date.

Please add tests and push the changes.

[Aditya-ds-1806]

@mvorisek In that case should we leave it to the users to figure out how they want to format the millisecond input via the formatDate field? I have pushed the changes, please let me know

[radu-cs]

Looking forward for this pull request to be merged.

[mvorisek]

This PR should be closed in favor of #2910 which added generic fractional seconds support.