began Protobuf integration

ParadoxSaveParser.WebAPI/Protobuf/ParsedData.proto

@@ -0,0 +1,20 @@
+syntax = "proto3";
+option csharp_namespace = "ParadoxSaveParser.WebAPI.MyProtobuf";
+
+message Item {
+  oneof value {
+    int64 i64 = 1;
+    double f64 = 2;
+    string str = 3;
+    ItemList list = 4;
+    ItemListMap map = 5;
+  }
+}
+
+message ItemList {
+  repeated Item items = 1;
+}
+
+message ItemListMap {
+  map<string, ItemList> items_map = 1;
+}