update validateFrameAction to take in channelFollowContext, updates fetchTrendingChannels return type

[MrKevinOConnell]

NOTE: relies on https://github.com/neynarxyz/OAS/pull/83 and https://github.com/neynarxyz/OAS/pull/84

updated: validateFrameAction -> https://docs.neynar.com/reference/validate-frame adds channelFollowContext as an option.

misc: fetchTrendingChannels -> https://docs.neynar.com/reference/trending-channels now returns TrendingChannelResponse lookupCastConversation -> https://docs.neynar.com/reference/cast-conversation Type is wrapped around an object that contains conversation

[MrKevinOConnell]

@Shreyaschorge seems like the updated limits are correct according to OAS, allof is removed though

[Shreyaschorge]

OAS

@MrKevinOConnell I meant it needs to be updated in methods documentation where we give an example of how to use a method.