Added banner on community page

[rohan9024]

Fixes #11316

Referenced this previous PR- #10078

The banner is displayed on community page

Screenshots-

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✅ ethereum-org-website-dev deploy preview ready

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[corwintines]

@rohan9024 I wanted to review this, but I see there are a lot of commits from #11075 in this PR.

Looking at your nav PR above, I see that was from your dev branch, so when you made this branch it included all those commits. If you can, those commits should be removed from this PR. If you don't have time today that is totally understandable, I will make a new PR with this if so for this release.

[rohan9024]

@rohan9024 I wanted to review this, but I see there are a lot of commits from #11075 in this PR.

Looking at your nav PR above, I see that was from your dev branch, so when you made this branch it included all those commits. If you can, those commits should be removed from this PR. If you don't have time today that is totally understandable, I will make a new PR with this if so for this release.

I wanted to ask whether the changes I have done in this PR is right? Then I can merge it with my dev branch.

[corwintines]

Thanks @rohan9024

I just updated this to also show on the homepage.