refactor: create presence crate and add tests

crates/core/presence/Cargo.toml

@@ -0,0 +1,19 @@
+[package]
+name = "revolt-presence"
+version = "0.0.1"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dev-dependencies]
+# Async
+async-std = { version = "1.8.0", features = ["attributes"] }
+
+[dependencies]
+# Utility
+log = "0.4.17"
+rand = "0.8.5"
+once_cell = "1.17.1"
+
+# Redis
+redis-kiss = "0.1.4"