Add sd-webui-panorama-tools extension

[Flyguygx]

Info

https://github.com/Flyguygx/sd-webui-panorama-tools
Panorama Tools adds a tab that provides various tools for creating/editing/viewing 360 degree panoramic images.

Checklist:

• [✓] I have read the Readme.md
• [✓] The description is written in English.
• [✓] The index.json and extension_template.json have not been modified.
• [✓] The entry is placed in the extensions directory with the .json file extension.

[w-e-w]

from my quick test I believe your extension does work even though I'm not entirely sure how to use it