Embed default rust config in binary

[Ottatop]

This PR embeds the default Rust config into the binary, meaning that Pinnacle no longer needs to run a separate process for the default config. It removes the hard dependency on Luarocks. This is halfway to resolving #214 and unblocking #215; the other half is to create a Makefile or some other external runner to copy over protobuf definitions and default configs for pinnacle config gen, but that's for another PR/commit.

This does mean that users who want to use the Lua API will need to manually cd into api/lua and run luarocks make [--local]. Edit: Or stick that in the Makefile maybe idk my brain's fried rn

Also build times went up by like 9% :P. I considered locking the embedding behind a feature flag to mitigate this for Lua users, but I think it's cleaner if Pinnacle doesn't hard require a separate process and library to run.

TODO:

• Fix how the Rust API handles tokio task panics
  • Currently all tokio tasks panic if something goes wrong. Also the shutdown watcher task panics as well because everything needs to have the same return value. Goal is to make all futures return a Result or something instead of panicking.
    • Nvm lol we ballin', turns out there was an issue with a tokio task not exiting correctly
• The layout receiver keeps erroring when the config is reloaded, should probably Option::take the receiver when reloading the config to drop it ignore the error? idk
• Remove the Luarocks make from build.rs
  • Removing the rest of the build script is for the future PR/commit
• Test running various configs and --no-config