feat: MetaMask Snap install page

[gluneau]

Pull Request Summary

• Fixes a misspelling initiatePolkdatodSnap --> initiatePolkadotSnap and some styling lint
• Adds a new page to install the MetaMask Astar Snap
• Start testing here: http://localhost:8080/snap

Check list

• contains breaking changes
• adds new feature
• modifies existing feature (bug fix or improvements)
• relies on other tasks
• documentation changes
• tested on mobile devices

[github-actions]

Visit the preview URL for this PR (updated for commit e14331f):

https://astar-apps--pr1048-feat-snap-home-page-mc6ar8pv.web.app

_{(expires Thu, 07 Dec 2023 18:25:52 GMT)}

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_{Sign: dd76fe72958fe2910fef9d53f0b4539b82b849db}

[Kahonnohak]

Thanks Greg

Is it your purpose to remove sidebar contents as well as header contents???

[gluneau]

Yes, because it would not even work before they complete the steps.
Less to click, more chances they follow the flow.

[Kahonnohak]

Please make some changes

You cannot remove the side bar that really looks weird (you cannot remove index from index). Please bring the side bar back.

• If users then press the button on the sidebar they should go back to the net work they were connected before
• If users don't have cache then give the wallet modal up when they connected to the asset page

please also change the wallet modal behaviour

• If user doesn't have Snap yet, bring the users to this page
• If user does have the Snap, that will connect

[Kahonnohak]

Hi @gluneau sorry but we have no one who can work on this, so lets then release with docs information and we can maybe come back next year.