refactor; create ad request validation

src/modules/geography/domain/types/coordinates.type.ts

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+export type Coordinates = {
+  lon: number;
+  lat: number;
+};

src/modules/geography/domain/types/point-type.enum.ts

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+export enum PointType {
+  HOUSE_NUMBER = 'HOUSE_NUMBER',
+  STREET_ADDRESS = 'STREET_ADDRESS',
+  LOCALITY = 'LOCALITY',
+  VENUE = 'VENUE',
+  OTHER = 'OTHER',
+}

src/modules/geography/domain/types/point.type.ts

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+import { PointType } from './point-type.enum';
+import { Coordinates } from './coordinates.type';
+
+export type Point = Coordinates & {
+  type?: PointType;
+};