Add custom share widget to replace videojs-share

[syeopite]

Resolves the videojs-share problem of the migration to videojs-8

Screenshots

I did originally want to also add fediverse links but I'm not sure how do that on a federated service

[syeopite]

All of the social links needs to be tested

[ChunkyProgrammer]

I did originally want to also add fediverse links but I'm not sure how do that on a federated service

For mastodon, someone was able to get a share link to work by prompting the user to enter their mastodon instance: https://dev.to/codepo8/adding-a-share-to-mastodon-link-to-any-web-site-485m (maybe this would work for lemmy as well?)

For BlueSky (which is somewhat decentralized and federated (in theory at least) but not ActivityPub/fediverse): https://docs.bsky.app/docs/advanced-guides/intent-links#compose-post