[PowerToys Run] Increase User-Friendliness of PTRun Unit Converter Plugin

[NaroZeol]

Description of the new feature / enhancement

The Unit Converter is a useful plugin, however, it lacks a help message when the keyword is activated.

Thanks to issue #33490, the Value Generator now offers excellent usage suggestions. I hope to see similar improvements like those made to the Value Generator.

I think it would be beneficial to list the usage of all supported transformations.

A possible form of the list:

• usage: {keyword} <value> <from> in <to>

• cm, m, km, ft...
  Length

• second, month, day, year...
  Duration

• .....

Scenario when this would be used?

This will be useful for quickly understanding all the features of this plugin without having to search for the documentation page.

Supporting information

No response

[azlkiniue]

I think this problem is harder to solve than Value Generator. In Value Generator, I was referenced the content based on the powertoys documentation.
https://learn.microsoft.com/en-us/windows/powertoys/run#value-generator-plugin

In Unit Converter, even the documentation does not contain thorough information about what can we do with this plugin

For example, the query format isn't specified, all of these queries are valid