add: like and recast reactions to `NeynarCastCard`

[dylsteck]

this PR adds like and recast actions to the NeynarCastCard component by using Sign In with Neynar

the flow is as follows:

• developer sets allowReactions to be true on NeynarCastCard
• the user clicks the like or recast icons and the Sign In with Neynar button pops up
• upon login, the user can hit like/recast and the action will go through -- as seen by the icons changing colors(you can check on Warpcast as well)

two notes: 1) this doesn't support commenting yet but will in the future 2) with allowReactions set to true, you can also override any of the onComment, onRecast, or onLike functions yourself -- but if not then onRecast and onLike will default to the SIWN experience(demo'd below)

https://github.com/neynarxyz/react/assets/12853808/69cc739f-5bf2-4ccc-9fd7-4450cc9f0565

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Name	Status	Preview	Comments	Updated (UTC)
react	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 5, 2024 3:09pm

[dylsteck]

@Shreyaschorge i made most of the changes from the comments you left(made one small comment) and will work on following the atomic design structures more going forward. i just need to make one more change on the auth popover on Reactions.tsx and then this PR should be good to be reviewed again.

[dylsteck]

just updated the PR to address the comments & also changed the styling of the auth Popover (below)