Moved backend code into its own subfolder

backend/Cargo.toml

@@ -0,0 +1,21 @@
+[package]
+name = "oott"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+env_logger = "0.11.8"
+log = "0.4.29"
+pnet = "0.35.0"
+tokio = { version = "1.0", features = ["full"] }
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+rusqlite = { version = "0.38.0", features = ["bundled", "chrono"] }
+rusqlite_migration = { version = "2.4.0", features = ["from-directory"] }
+include_dir = "0.7.4"
+chrono = "0.4.43"
+pushover = "0.4.0"
+config = "0.15.19"
+lazy_static = "1.5.0"
+duration-string = { version="0.5.3", features = ["serde"] }
+clap = {version="4.5.54", features=["derive"]}