Add back button on the package info.

[AmicoderDev]

Issue Description:

The package info page lacks a back button, making it challenging for users to navigate back. To enhance user experience, I suggest incorporating a back button. Additionally, please consider adding a route condition to confirm the user's origin route for better functionality.

Suggested Solution:

Place the back button at the top, following the search component. This location is optimal for easy accessibility.

[alwaisy]

Thanks for suggesting this feat. It is planned, visit readme.

[alwaisy]

@amicoder-lol It is fixed here 364fff4