Add new fields to submission and apply design to submit page

[damianmarti]

Added the fields:

• Telegram handler
• Link to video
• Feedback

These new fields are not required.

Submit page on desktop:

Submit page on mobile:

closes #28

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Name	Status	Preview	Comments	Updated (UTC)
extensions-hackathon	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 18, 2024 10:10pm

[Pabl0cks]

Merging this! We can polish some stuff later if need