src: main: Implement commandline arguments parsing

Use clap for argument parsing, read the config file path from the
commandline and implement basic help and version options

Cargo.toml

@@ -13,6 +13,7 @@ tracing = "0.1"
 serde_yaml = "0.9"
 serde_json = "1.0"
 tracing-subscriber = "0.3.18"
+clap = { version = "4.6.7", features = ["derive"] }
 tokio = { version = "1.41", features = ["macros", "rt-multi-thread"] }
 matrix-sdk = { version = "0.8.0", default-features = false, features = [ "native-tls", "anyhow", "markdown" ] }
 rumqttc = "0.25"