GitHub Action: Upload releases as file downloadables

[Birk Jernström]

Can be made in https://github.com/polarsource/actions

Feature
A GitHub Action for Polar to automate publishing a GitHub release as a file downloadable on Polar using our Files API

Expectations
Let us know before you want to start working on this so we can help & offer support if needed + avoid any issues down the road with a surprise PR.

Upvote & Fund

• We're using Polar.sh so you can upvote and help fund this issue.
• We receive the funding once the issue is completed & confirmed by you.
• Thank you in advance for helping prioritize & fund our backlog :^)