fix: Add Back button to Pricing page

[AkashJana18]

Description

This PR introduces a Back button to the top-right corner of the subscription (pricing) page.

• Implemented using Next.js Link component.
• Button redirects to: https://storacha.console.network/logout
• Positioned in the top-right corner using Tailwind (absolute top-4 right-4).
• Styled with bg-hot-red, text-white, rounded-full corners, and hover state for better UX.
• Improves navigation by allowing users to quickly return/logout without completing subscription flow.

Motivation

This change enhances usability, giving users a clear and accessible way to exit the subscription flow.
Fixes: #353

[travis]

there's a lot of unnecessary reformatting, please remove it to better highlight the change you'd like to make.

if you'd like to reformat the code, please introduce a new PR proposing the changes you'd like to make

[AkashJana18]

Sorry for the inconvenience caused by the unnecessary reformatting from the Prettier lint. I’ve cleaned it up, and the PR is now ready for review.

[Dhruv-Varshney-developer]

I noticed the lockfile shows webpack downgrades from 5.99.6 to 5.88.0 across multiple entries. Can you use the latest version of pnpm and regenerate the lockfile?

[AkashJana18]

I noticed the lockfile shows webpack downgrades from 5.99.6 to 5.88.0 across multiple entries. Can you use the latest version of pnpm and regenerate the lockfile?

The webpack versions (5.99.6 and 5.88.0) were already present in the lockfile before my PR, and I used the repo’s pinned pnpm version (10.1.0) as defined in package.json. My changes didn’t introduce the downgrade.
If we’d like to upgrade to the latest pnpm and regenerate the lockfile for consistency, I suggest handling that in a separate PR so it doesn’t mix with this change.

[travis]

this URL should be different per-environment - in fact, does it even need to be an absolute URL? why not use a relative URL here?

[travis]

"Back" doesn't feel like it gives the user enough context here - I think it would be better to have this button say "Nevermind, Log Me Out" or something along those lines - I get that the only sensible thing to do if they want to leave this page is to log out, but "Back" makes it sound like we're going to do something else and I want to be super clear with the user about what they're doing.