[PowerToys Run] [Time and Date] Infer input format

[PRO-2684]

Description of the new feature / enhancement

For now, I need to explicitly specify the timestamp format (* I've set t as the direct activation command):

If I skip it, the plugin will refuse to parse it:

However, when I type 1737008124773, mostly I'd expect it to be parsed as ums.

To be specific, I suggest using the following regexes for inferring input format, instead of requiring explicit annotation:

Input	Format
\d{13}	ums
\d{10}	u

Explicit prefixes are still required for inputs that do not match any of them.

Scenario when this would be used?

Say I've copied a timestamp from somewhere. With inferring I only need to:

1. Invoke the direct activation command
2. Paste that timestamp

Without inferring I'd have to:

1. Invoke the direct activation command
2. Paste that timestamp
3. Read through the lengthy error message
4. Figure out whether the timestamp is u or ums
5. Move the cursor before the timestamp
6. Give it a proper prefix

Which is just so annoying and unproductive.

Supporting information

No response

[htcfreek]

The problem is that you theoretically want to convert 1 unix millisecond. And then there are not enough digits to detect the format.