add sticky anchor links on the assets page

[ayumitk]

Pull Request Summary

• Added the sticky anchor links on the assets page
• It appears only Shibuya for now

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

This pull request makes the following changes:

Adds

[github-actions]

Visit the preview URL for this PR (updated for commit 677420c):

https://astar-apps--pr1149-feat-assets-page-hyp-kh6ve8jr.web.app

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[Kahonnohak]

This is all great, lets not spend more time on this but just two points

1. Please change the position just below the account. Main reason is if we had the tab next to Staking, the tab on Staking section doesn't have attention (since tab blue is bigger) so wanted to separate from it.
2. Background: Gray1
3. Please add the dark theme with the background colour: Navy 3

[ayumitk]

@Kahonnohak Thank you for your review! I've updated all of them

[Kahonnohak]

Thank you! Great work - we will update this tab and add notification next time.