Create initial message schemas

Closes #7 (closed)

examples/ecosub_c2/mission_plan.json

   "delivery_type": "publish",
   "encoded": false,
   "message_type": "mission_plan",
-  "platform_serial": "reav-60",
+  "platform_ID": 1,
   "autonomy_engine_mission_plan_ID": 1,
   "plan": [
     {

examples/ecosub_c2/platform_status.json

     "longitude": -10.122,
     "depth": 50,
     "altitude": 20,
+    "heading": 90.0,
     "health_status": "Warning",
     "localisation_error": null,
     "usbl_fix_seconds_ago": null,

examples/gui/planning_configuration.json

+{
+    "message_ID": "b427003c-0000-11aa-a1eb-bvcdfghjgfdd",
+    "timestamp": "2022-11-16T00:00:00Z",
+    "version": 2,
+    "source": "ecosub_c2",
+    "destination": "autonomy_engine",
+    "delivery_type": "publish",
+    "encoded": false,
+    "message_type": "platform_status",
+    "planning_config_ID": 3,
+    "exclusion_zones": [
+      {
+        "geometry_coordinates": [
+          [
+            [
+              -4.187143188645706,
+              50.37072283932642
+            ],
+            [
+              -4.202697005964865,
+              50.368816892405874
+            ],
+            [
+              -4.203156724702808,
+              50.365640144076906
+            ],
+            [
+              -4.19449868846155,
+              50.362267670845654
+            ]
+          ]
+        ]
+      }
+    ],
+    "squads": [
+      {
+        "squad_ID": 1,
+        "no_of_platforms": 1,
+        "squad_mission_type": "tracking",
+        "squad_state": false,
+        "platforms": [
+          {
+            "model": "reav",
+            "platform_ID": 23,
+            "serial": "reav-60",
+            "emergency": {
+              "additional_data": {},
+              "latitude_waypoint": -7.432,
+              "longitude_waypoint": 50.365,
+              "safe_command": "go_home",
+              "target_depth": 10
+            },
+            "max_velocity": 0.9,
+            "min_altitude": 15.2,
+            "min_velocity": 0.1,
+            "additional_data": {}
+          }
+        ],
+        "region_of_interest": {
+          "geometry_coordinates": [
+            [
+              [
+                -4.187143188645706,
+                50.37072283932642
+              ],
+              [
+                -4.202697005964865,
+                50.368816892405874
+              ],
+              [
+                -4.203156724702808,
+                50.365640144076906
+              ],
+              [
+                -4.19449868846155,
+                50.362267670845654
+              ]
+            ]
+          ]
+        }
+      },
+      {
+        "squad_ID": 2,
+        "no_of_platforms": 3,
+        "squad_mission_type": "survey",
+        "squad_state": true,
+        "platforms": [
+          {
+            "platform_ID": 23,
+            "serial": "ecosub-2",
+            "model": "ecosub",
+            "emergency": {
+              "additional_data": {},
+              "latitude_waypoint": -7.432,
+              "longitude_waypoint": 50.365,
+              "safe_command": "go_home",
+              "target_depth": 10.0
+            },
+            "max_velocity": 0.9,
+            "min_altitude": 15.2,
+            "min_velocity": 0.1,
+            "additional_data": {
+                "scan_type": "DVL",
+                "swath_width": 10
+            }
+          },
+          {
+            "platform_ID": 10,
+            "serial": "ecosub-5",
+            "model": "ecosub",
+            "emergency": {
+              "additional_data": {},
+              "latitude_waypoint": -0.432,
+              "longitude_waypoint": 20.365,
+              "safe_command": "go_home",
+              "target_depth": 0.0
+            },
+            "max_velocity": 0.9,
+            "min_altitude": 15.2,
+            "min_velocity": 0.1,
+            "additional_data": {
+                "scan_type": "DVL",
+                "swath_width": 10
+            }
+          }
+        ],
+        "region_of_interest": {}
+      },
+      {
+        "squad_ID": 3,
+        "no_of_platforms": 1,
+        "squad_mission_type": "inspection",
+        "squad_state": false,
+        "platforms": [
+          {
+            "platform_ID": 23,
+            "serial": "ah-1",
+            "model": "autosub",
+            "emergency": {
+              "additional_data": {},
+              "latitude_waypoint": 20.432,
+              "longitude_waypoint": 50.365,
+              "safe_command": "safety_abort",
+              "target_depth": 0.0
+            },
+            "max_velocity": 0.9,
+            "min_altitude": 15.2,
+            "min_velocity": 0.1,
+            "additional_data": {
+                "scan_type": "MBES"
+            }
+          }
+        ],
+        "region_of_interest": {}
+      }
+    ]
+  }
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