Implement Jackett search entpoint

proto/music_agregator/indexer/v1/indexer.proto

@@ -8,11 +8,35 @@ service IndexerService {
 }
 
 message SearchRequest {
-  string indexer = 1;
-  string query = 2;
-  int32 limit = 3;
+  string query = 1;
+  int32 limit = 2;
+  string tracker = 3; 
 }
 message SearchResponse {
+  repeated SearchItem result = 1;
+}
+
+message SearchItem {
+  string title = 1;
+  string link = 2;
+  string guid = 3;
+  string pub_date = 4;
+  int64 size = 5;
+  string description = 6;
+  repeated string categories = 7;
+  Enclosure enclosure = 8;
+  repeated TorznabAttr torznab_attrs = 9;
+}
+
+message Enclosure {
+  string url = 1;
+  int64 length = 2;
+  string type = 3;
+}
+
+message TorznabAttr {
+  string name = 1;
+  string value = 2;
 }
 
 message CapabilitiesRequest {