feat: improvements for the navigation and footer

[pedroferreira1]

Context

We are cleaning some information from the navigation so we can better add the nano menu in the next PR.

Figma: https://www.figma.com/design/IeP1TlJ2rPyGQBWxE4Al0f/Explorer?node-id=2304-32043&t=d5v5j2mvqRVidMk5-0

Acceptance Criteria

• The network must be moved below the hathor logo and without the prefix "Hathor".
• The box explorer should be moved to the footer.
• The mobile sidebar should be more clean.
• Increase search bar size (this wasn't on figma but it was too small. Maybe this will be reduced when nano navigation is added)

Security Checklist

• Make sure you do not include new dependencies in the project unless strictly necessary and do not include dev-dependencies as production ones. More dependencies increase the possibility of one of them being hijacked and affecting us.