feat: Added env support for prog args

- The `zk_evm` leader bin just had env support added for it's prog args. However, some of its args are defined in `paladin`,
so we needed to create a separate PR for this repo to add env support for the `paladin` specific prog args.
- See also PR [#786](0xPolygonZero/zk_evm#786) in `zk_evm`.

paladin-core/src/config/mod.rs

@@ -24,19 +24,24 @@ use clap::{Args, ValueEnum};
 pub struct Config {
     /// Specifies the routing key for publishing task messages. In most cases,
     /// the default value should suffice.
-    #[arg(long, short, default_value = "task")]
+    #[arg(
+        long,
+        short,
+        env = "PALADIN_TASK_BUS_ROUTING_KEY",
+        default_value = "task"
+    )]
     pub task_bus_routing_key: String,
 
     /// Determines the serialization format to be used.
-    #[arg(long, short, value_enum, default_value_t = Serializer::Cbor)]
+    #[arg(long, short, env="PALADIN_SERIALIZER", value_enum, default_value_t = Serializer::Cbor)]
     pub serializer: Serializer,
 
     /// Specifies the runtime environment to use.
-    #[arg(long, short, value_enum, default_value_t = Runtime::Amqp)]
+    #[arg(long, short, env="PALADIN_RUNTIME", value_enum, default_value_t = Runtime::Amqp)]
     pub runtime: Runtime,
 
     /// Provides the URI for the AMQP broker, if the AMQP runtime is selected.
-    #[arg(long, env = "AMQP_URI", required_if_eq("runtime", "amqp"))]
+    #[arg(long, env = "PALADIN_AMQP_URI", required_if_eq("runtime", "amqp"))]
     pub amqp_uri: Option<String>,
 }