sim-lib: Get rid of nested json for node definition

I must have been way more sleep-deprived than I thought when originally designing this,
but we don't really need the nested json with node type tags to parse node information
(as long as the node info has, **at least** one different field name).

Mainly, this goes from:

```json
"nodes": [
    {
        "LND": {
            "id": "...",
            "address": "...",
            "macaroon": "...",
            "cert": "..."
        }
    },
    {
        "CLN": {
            "id": "...",
            "address": "...",
            "ca_cert": "...",
            "client_cert": "...",
            "client_key": "..."
        }
    }
]
```

To:

```json
"nodes": [
    {
        "id": "...",
        "address": "...",
        "macaroon": "...",
        "cert": "..."
    },
    {
        "id": "...",
        "address": "...",
        "ca_cert": "...",
        "client_cert": "...",
        "client_key": "..."
    }
]
```

README.md

@@ -70,21 +70,17 @@ not "drain" from the simulation.
 {
   "nodes": [
     {
-      "LND": {
-        "id": "Alice",
-        "address": "https://localhost:10011",
-        "macaroon": "/path/admin.macaroon",
-        "cert": "/path/tls.cert"
-      }
+      "id": "Alice",
+      "address": "https://localhost:10011",
+      "macaroon": "/path/admin.macaroon",
+      "cert": "/path/tls.cert"
     },
-    {
-      "CLN": {
-        "id": "0230a16a05c5ca120136b3a770a2adfdad88a68d526e63448a9eef88bddd6a30d8",
-        "address": "https://localhost:10013",
-        "ca_cert": "/path/ca.pem",
-        "client_cert": "/path/client.pem",
-        "client_key": "/path/client-key.pem"
-      }
+    { 
+      "id": "0230a16a05c5ca120136b3a770a2adfdad88a68d526e63448a9eef88bddd6a30d8",
+      "address": "https://localhost:10013",
+      "ca_cert": "/path/ca.pem",
+      "client_cert": "/path/client.pem",
+      "client_key": "/path/client-key.pem"
     }
   ]
 }
@@ -124,21 +120,17 @@ The example simulation file below sets up the following simulation:
 {
   "nodes": [
     {
-      "LND": {
-        "id": "Alice",
-        "address": "https://localhost:10011",
-        "macaroon": "/path/admin.macaroon",
-        "cert": "/path/tls.cert"
-      }
+      "id": "Alice",
+      "address": "https://localhost:10011",
+      "macaroon": "/path/admin.macaroon",
+      "cert": "/path/tls.cert"
     },
     {
-      "CLN": {
-        "id": "0230a16a05c5ca120136b3a770a2adfdad88a68d526e63448a9eef88bddd6a30d8",
-        "address": "https://localhost:10013",
-        "ca_cert": "/path/ca.pem",
-        "client_cert": "/path/client.pem",
-        "client_key": "/path/client-key.pem"
-      }
+      "id": "0230a16a05c5ca120136b3a770a2adfdad88a68d526e63448a9eef88bddd6a30d8",
+      "address": "https://localhost:10013",
+      "ca_cert": "/path/ca.pem",
+      "client_cert": "/path/client.pem",
+      "client_key": "/path/client-key.pem"
     }
   ],
   "activity": [

docker/README.md

@@ -51,12 +51,10 @@ For instance, in your configuration:
 
 ```json
 {
-  "LND": {
-    "id": "022579561f6f0ea86e330df2f9e7b2be3e0a53f8552f9d5293b80dfc1038f2f66d",
-    "address": "https://host.docker.internal:10002",
-    "macaroon": "/path/in/container/lnd/bob/data/chain/bitcoin/regtest/admin.macaroon",
-    "cert": "/path/in/container/lnd/bob/tls.cert"
-  }
+  "id": "022579561f6f0ea86e330df2f9e7b2be3e0a53f8552f9d5293b80dfc1038f2f66d",
+  "address": "https://host.docker.internal:10002",
+  "macaroon": "/path/in/container/lnd/bob/data/chain/bitcoin/regtest/admin.macaroon",
+  "cert": "/path/in/container/lnd/bob/tls.cert"
 }
 ```
 

sim-lib/src/lib.rs

@@ -25,10 +25,9 @@ mod random_activity;
 mod serializers;
 
 #[derive(Serialize, Deserialize, Debug, Clone)]
+#[serde(untagged)]
 pub enum NodeConnection {
-    #[serde(alias = "lnd", alias = "Lnd")]
     LND(lnd::LndConnection),
-    #[serde(alias = "cln", alias = "Cln")]
     CLN(cln::ClnConnection),
 }