initial structure implemented

docs -> _docs

components/global_place_recognition/base.py

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+from abc import ABC, abstractmethod
+import numpy as np
+
+from models.core import GPSPoint
+from models.satellite import TileCandidate
+from models.processing import AlignmentResult
+
+
+class GlobalPlaceRecognitionBase(ABC):
+    @abstractmethod
+    async def extract_global_descriptor(self, image: np.ndarray) -> np.ndarray:
+        pass
+
+    @abstractmethod
+    async def search_candidates(
+        self,
+        descriptor: np.ndarray,
+        search_center: GPSPoint,
+        search_radius: float,
+        top_k: int = 10,
+    ) -> list[TileCandidate]:
+        pass
+
+    @abstractmethod
+    async def verify_candidate(
+        self, uav_image: np.ndarray, satellite_image: np.ndarray
+    ) -> AlignmentResult:
+        pass
+
+    @abstractmethod
+    async def index_tile(
+        self, tile_image: np.ndarray, tile_id: str, gps_center: GPSPoint
+    ) -> bool:
+        pass
+
+    @abstractmethod
+    async def build_index_for_area(
+        self, nw: GPSPoint, se: GPSPoint, zoom: int
+    ) -> int:
+        pass
+
+    @abstractmethod
+    async def get_indexed_tile_count(self) -> int:
+        pass
+