fix: updates for remix quickstart

[uF4No]

Description

• Updates code for token contract
• Updates scripts to adapt to new Remix folder structure
• Improves wording on how to run scripts on Remix
• Updates buttons to open the full project on Remix

• Linked Issues

N/A

Additional context

Merge with PR in template project repo: https://github.com/zkSync-Community-Hub/zksync-quickstart-remix/pull/2

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit 2b86e7a):

https://zksync-docs-staging-5eb09--pr230-fix-quickstart-remix-f27psfua.web.app

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[github-actions[bot]]

:tada: This PR is included in version 1.34.5 :tada:

The release is available on GitHub release

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