Implement applyEdit in LSP for signal connecting

modules/gdscript/language_server/lsp.hpp

@@ -1266,6 +1266,58 @@ struct DocumentSymbol {
 	}
 };
 
+struct WorkspaceEdit {
+	HashMap<String, List<TextEdit>> changes;
+
+	void add_edit(String uri, TextEdit edit) {
+		if (changes.has(uri)) {
+			changes[uri].push_back(edit);
+		} else {
+			List<TextEdit> edits;
+			edits.push_back(edit);
+			changes[uri] = edits;
+		}
+	}
+
+	Dictionary to_json() {
+		Dictionary dict;
+
+		Dictionary changes_dict;
+
+		List<String> key_list;
+		changes.get_key_list(&key_list);
+		for (int i = 0; i < key_list.size(); ++i) {
+			String uri = key_list[i];
+
+			List<TextEdit> edits = changes[key_list[i]];
+			Array changes_arr;
+			for (int l = 0; l < edits.size(); ++l) {
+				Dictionary change_dict;
+				change_dict["newText"] = edits[l].newText;
+				change_dict["range"] = edits[l].range.to_json();
+				changes_arr.push_back(change_dict);
+			}
+			changes_dict[uri] = changes_arr;
+		}
+
+		dict["changes"] = changes_dict;
+
+		return dict;
+	}
+};
+
+struct ApplyWorkspaceEditParams {
+	WorkspaceEdit edit;
+
+	Dictionary to_json() {
+		Dictionary dict;
+
+		dict["edit"] = edit.to_json();
+
+		return dict;
+	}
+};
+
 struct NativeSymbolInspectParams {
 	String native_class;
 	String symbol_name;