[Explorer] New main page design

[mdaria17]

Link to the Figma File

• update header (add new links) – link
• place the search component below and add title with image – link
• new widget for shards – link
• update transactions widget (keep only transactions today and past 14 days) – link
• update latest blocks widget (show last 8-10 blocks). + Add tabs for non-empty block – link
• add latest transactions widget (show last 8-10 transactions) – link
• add footer – link connected with the issue.
• check that is resizes correctly on each breakpoint – link

[ukorvl]

I took new charts

[ukorvl]

for footer we have a related one #733

[emarc99]

Would love to give this a go, pretty familiar with the codebase.

[ukorvl]

There are some component which i'm gonna do myself. The rest i'm gonna split on small issues and it will be amazing to have a help with them!