chore: Add localization testing tool to tools directory

[sfoslund]

Details

Adds a test app that can be used to test axe-windows localization to the tools directory. See the README for details on usage.

Motivation

Keep all tools related to axe-windows in one place

Pull request checklist

• [n/a] Addresses an existing issue: #0000

[sfoslund]

/azp run

[azure-pipelines[bot]]

Azure Pipelines successfully started running 1 pipeline(s).

[sfoslund]

Sorry for the noise here, the license check kept getting stuck. Should be good now, will merge once CI goes green :)