fix: remove homepage contract list, promote staking stats, adjust layout

[dcroote]

Closes #121 in preparation of adding incinerator stats. Before and after screenshots for convenience:

[bbenligiray]

I'm just looking at the screenshot, looks like a clear improvement to me. Some suggestions

• Calling the epoch on the right "previous" doesn't feel right, so "Past Epoch" could be used instead of both instances of "Previous Epoch" (though I would defer to native speakers about this kind of stuff)
• For the "Circulating Supply" and "Total Staked" sections to look more symmetric, we can do this instead

Circulating Supply	Total Staked
Total Supply	Staking Target

and to take that further so that totals are aligned

Total Supply	Total Staked
Circulating Supply	Staking Target

As a side effect this draws attention on the total supply rather than the circulating supply but personally I'm neutral on that.

[aquarat]

It looks fine to me from a technical standpoint 🚀
It also generally looks better/visually makes more sense :)

[dcroote]

Good suggestions @bbenligiray - all incorporated, see below: