docs: fix setup steps for Next.js ^14 /w app router and page router

[mkubdev]

Description

• Revise the README to guide users in setting up react-photo-sphere-viewer seamlessly for Next.js with both App Router and Page Router configurations.
• Rectified the Compass's hotspots from using longitude to yaw in the CompassPlugins example. Refer to this link for more details.

Issues

Closes: #54 #51

Additional notes

@Elius94, I've incorporated a demo for plugins in the Next.js examples. However, it closely resembles the one here. Perhaps it's better to exclude them to streamline the Next.js setup illustration.

Also, do you want me to add sandbox for both configurations?

Regards,

[Elius94]

Thank you so much Maxime! 🙏 Also, do you want me to add sandbox for both configurations? If you can do them in easy way, it would be really useful for Next.js users! :) Thanks for contributing

[mkubdev]

Thank you so much Maxime! 🙏 Also, do you want me to add sandbox for both configurations? If you can do them in easy way, it would be really useful for Next.js users! :) Thanks for contributing

You are welcome! 🙏 Ok, will do it asap. Thanks for this awesome wrapper.