Enhance README with download link and image

[michaeljolley]

Added a download link and image for the weather extension.

Description

Related Issue

Checklist

• My code builds without errors (dotnet build -r win-x64)
• I have run the tests (dotnet test -r win-x64)
• I have added tests for new functionality (if applicable)
• My commit messages follow Conventional Commits
• I have updated documentation (if applicable)

[Copilot]

Pull request overview

Updates the repository README to promote the Weather extension by adding a Microsoft Store download badge/link near the top of the document.

Changes:

• Added a Microsoft Store installer link.
• Added a “Get it from Microsoft” badge image to accompany the link.

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[Copilot]

The new store badge image is missing an alt attribute. Please add descriptive alt text (e.g., “Get it from Microsoft Store”) so the README remains accessible to screen readers.

Suggested change

	<img src="https://get.microsoft.com/images/en-us%20dark.svg" width="200"/>
	<img src="https://get.microsoft.com/images/en-us%20dark.svg" width="200" alt="Get it from Microsoft Store" />

[Copilot]

There’s a stray tab indentation before the <img> and an extra space before the closing > on the <a ...> tag. Please normalize the whitespace (spaces-only indentation, no trailing spaces) to keep the README diff clean and consistent.

Suggested change

	<a href="https://get.microsoft.com/installer/download/9N01D6BS9V98?referrer=appbadge" target="_self" >
	<img src="https://get.microsoft.com/images/en-us%20dark.svg" width="200"/>
	<a href="https://get.microsoft.com/installer/download/9N01D6BS9V98?referrer=appbadge" target="_self">
	<img src="https://get.microsoft.com/images/en-us%20dark.svg" width="200"/>