feat: server sdk (#47)

* New webrtc build scripts (Still not integrated within the SDK)
* New livekit-api crate (Integrate the server sdk protocol of livekit)
* Moved livekit-utils to livekit-protocol

livekit-api/src/lib.rs

@@ -0,0 +1,9 @@
+pub mod access_token;
+pub mod services;
+pub mod webhook_receiver;
+
+pub(crate) fn get_env_keys() -> Result<(String, String), std::env::VarError> {
+    let api_key = std::env::var("LIVEKIT_API_KEY")?;
+    let api_secret = std::env::var("LIVEKIT_API_SECRET")?;
+    Ok((api_key, api_secret))
+}