initial structure implemented

docs -> _docs

models/core/gps_point.py

@@ -0,0 +1,21 @@
+from pydantic import BaseModel, field_validator
+
+
+class GPSPoint(BaseModel):
+    lat: float
+    lon: float
+
+    @field_validator("lat")
+    @classmethod
+    def validate_lat(cls, v: float) -> float:
+        if not -90 <= v <= 90:
+            raise ValueError("Latitude must be between -90 and 90")
+        return v
+
+    @field_validator("lon")
+    @classmethod
+    def validate_lon(cls, v: float) -> float:
+        if not -180 <= v <= 180:
+            raise ValueError("Longitude must be between -180 and 180")
+        return v
+