reformatting sponsorship page and removing prospectus

[Adr1an04]

Why

We don’t want the sponsorship package public right no, but we still want sponsors to have an easy way to contact us.

What changed

• Updated the Blade sponsorship page to be a simple, clean landing page
• Removed the public prospectus download ( deleted )
• Added new video and metrics

How to test

• Go to /sponsor
• Confirm the page loads and looks normal on desktop and mobile
• Confirm both videos render/play
• Confirm there is no link to a sponsor/prospectus.pdf or prospectus.pdf
• Click the email button and confirm it opens your mail

Screenshots

Before:

After:

Before:

After:

[DGoel1602]

lgtm you should've been frontend on dev instead of pres ong