Pod controller refactoring

[thecraftianman]

• Styling is now consistent throughout the whole file
• Usermessages replaced with net messages
• HasPod() and HasPly() have been removed, with their functionality being merged into GetPod() and GetPly(), respectively. These functions were only used in this file and have had all uses replaced
• Instead of constantly triggering updates to the pod's many outputs, they are now cached on the pod itself and only updated when they change, which is significantly faster overall
• Reduced many __index calls and other miscellaneous optimizations

[thecraftianman]

I forgot about these PRs for a couple weeks lol

I've made the recacheOutput method check for self.Outputs.(name).Value instead as requested. I also moved the output trigger for the player's team into PlayerEntered in order to save a bit more performance (do players really need to change teams and have that actually impact other Wire entities without having to get out of the vehicle that often?)