feat: add ARP example (#282)

This PR adds an example with a local network consisting of 3 hosts
connected to a single switch.

![image of the network
example](https://github.com/user-attachments/assets/ef54f17b-f995-4cbe-8211-bc3a8ce9765b)

The three hosts have empty ARP tables and users are supposed to populate
them sending ARP requests.

Co-authored-by: Pedro Gallino <[email protected]>

Author: MegaRedHand

examples/localNetwork.json

@@ -0,0 +1,171 @@
+{
+  "nodes": [
+    {
+      "id": 1,
+      "type": 2,
+      "x": 4717.25,
+      "y": 5001.484375,
+      "interfaces": [
+        {
+          "name": "eth0",
+          "mac": "00:00:10:00:00:01"
+        },
+        {
+          "name": "eth1",
+          "mac": "00:00:10:00:00:02"
+        },
+        {
+          "name": "eth2",
+          "mac": "00:00:10:00:00:03"
+        },
+        {
+          "name": "eth3",
+          "mac": "00:00:10:00:00:04"
+        },
+        {
+          "name": "eth4",
+          "mac": "00:00:10:00:00:05"
+        },
+        {
+          "name": "eth5",
+          "mac": "00:00:10:00:00:06"
+        },
+        {
+          "name": "eth6",
+          "mac": "00:00:10:00:00:07"
+        },
+        {
+          "name": "eth7",
+          "mac": "00:00:10:00:00:08"
+        }
+      ],
+      "tag": "Switch",
+      "forwardingTable": []
+    },
+    {
+      "id": 2,
+      "type": 0,
+      "x": 4738.75,
+      "y": 4821.96875,
+      "interfaces": [
+        {
+          "name": "eth0",
+          "mac": "00:00:10:00:00:09",
+          "ip": "10.0.0.1"
+        }
+      ],
+      "tag": "Host A",
+      "mask": "255.255.255.255",
+      "arpTable": [
+        ["10.0.0.2", "", false],
+        ["10.0.0.3", "", false],
+        ["10.0.0.4", "", false]
+      ],
+      "runningPrograms": []
+    },
+    {
+      "id": 3,
+      "type": 0,
+      "x": 4887.25,
+      "y": 5141.484375,
+      "interfaces": [
+        {
+          "name": "eth0",
+          "mac": "00:00:10:00:00:0a",
+          "ip": "10.0.0.2"
+        }
+      ],
+      "tag": "Host B",
+      "mask": "255.255.255.255",
+      "arpTable": [
+        ["10.0.0.1", "", false],
+        ["10.0.0.3", "", false],
+        ["10.0.0.4", "", false]
+      ],
+      "runningPrograms": []
+    },
+    {
+      "id": 4,
+      "type": 0,
+      "x": 4533.25,
+      "y": 5135.484375,
+      "interfaces": [
+        {
+          "name": "eth0",
+          "mac": "00:00:10:00:00:0b",
+          "ip": "10.0.0.3"
+        }
+      ],
+      "tag": "Host C",
+      "mask": "255.255.255.255",
+      "arpTable": [
+        ["10.0.0.1", "", false],
+        ["10.0.0.2", "", false],
+        ["10.0.0.4", "", false]
+      ],
+      "runningPrograms": []
+    }
+  ],
+  "edges": [
+    {
+      "from": {
+        "id": 3,
+        "iface": 0
+      },
+      "to": {
+        "id": 1,
+        "iface": 0
+      }
+    },
+    {
+      "from": {
+        "id": 1,
+        "iface": 1
+      },
+      "to": {
+        "id": 2,
+        "iface": 0
+      }
+    },
+    {
+      "from": {
+        "id": 4,
+        "iface": 0
+      },
+      "to": {
+        "id": 1,
+        "iface": 2
+      }
+    },
+    {
+      "from": {
+        "id": 1,
+        "iface": 1
+      },
+      "to": {
+        "id": 2,
+        "iface": 0
+      }
+    },
+    {
+      "from": {
+        "id": 3,
+        "iface": 0
+      },
+      "to": {
+        "id": 1,
+        "iface": 0
+      }
+    },
+    {
+      "from": {
+        "id": 4,
+        "iface": 0
+      },
+      "to": {
+        "id": 1,
+        "iface": 2
+      }
+    }
+  ]
+}