Unit converter supports negative values

[Dub1shu]

Summary of the Pull Request

Fixes #30678
Allow unit converter to convert negative values.
For example, -10℃ is converted to 14℉.

PR Checklist

• Closes: [Bug][PowerToys Run] Unit Converter doesn't accept sub-zero/negative temperatures #30678
• Communication: I've discussed this with core contributors already. If work hasn't been agreed, this work might be rejected
• Tests: Added/updated and all pass
• Localization: All end user facing strings can be localized
• Dev docs: Added/updated
• New binaries: Added on the required places
  • JSON for signing for new binaries
  • WXS for installer for new binaries and localization folder
  • YML for CI pipeline for new test projects
  • YML for signed pipeline
• Documentation updated: If checked, please file a pull request on our docs repo and link it here: #xxx

Detailed Description of the Pull Request / Additional comments

Previous Unit Converter was not designed to accept negative values.
In the regular expression used to distinguish between numbers and non-numbers, the minus sign was treated as a non-number character. Modify to treat the minus sign as part of the number.

Validation Steps Performed

When you launch PowerToys Run and enter %%-10C to F, it displays 14℉

[Dub1shu]

@microsoft-github-policy-service agree

[AzureArmageddon]

Thanks for working on my issue! Wondering if this PR does or if it should:

• Allow temperatures below absolute-zero (0 Kelvin)?
• Allow sub-zero values for non-temperature quantities?
  • Negative volumes?
  • Negative lengths?
  • Negative weights?

[Dub1shu]

Hi there! Thanks for checking.
Regarding your questions:

• Allowing temperatures below absolute zero (0 Kelvin):
  • It can convert temperatures below absolute zero.
  • I don't think we should allow temperatures below absolute zero. But this is an issue with UnitsNet, the library used within Unit Converter.
• Allow sub-zero values for non-temperature quantities?:
  • Yes, this PR also supports conversion of negative values other than temperature.
  • As an example, the results for negative volume are shown below.
    

[jaimecbernardo]

LGTM! Thank you for the contribution!