add wrapper class for place data passed to tokenizer

This is mostly for convenience and documentation purposes.

nominatim/tokenizer/icu_tokenizer.py

@@ -390,18 +390,18 @@ class LegacyICUNameAnalyzer(AbstractAnalyzer):
         """
         token_info = _TokenInfo(self._cache)
 
-        names = place.get('name')
+        names = place.name
 
         if names:
             fulls, partials = self._compute_name_tokens(names)
 
             token_info.add_names(fulls, partials)
 
-            country_feature = place.get('country_feature')
+            country_feature = place.country_feature
             if country_feature and re.fullmatch(r'[A-Za-z][A-Za-z]', country_feature):
                 self.add_country_names(country_feature.lower(), names)
 
-        address = place.get('address')
+        address = place.address
         if address:
             self._process_place_address(token_info, address)