Able to Post Via Farcaster

[codingshot]

use neynar to post via farcaster

https://docs.neynar.com/reference/post-cast

complexity with gas, may need to switch to pinata forecaster hub for metatransactions (paying for trasnaction on behalf of user)
able to post, able to embed media (use pinata for uplaoding any assets)

Dont have designs, but show in that parituclar feed
Need to add signin with farcaster (should be a seperate task #53)