add editconfig

.editorconfig

@@ -0,0 +1,17 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 4
+indent_style = space
+insert_final_newline = true
+max_line_length = 100
+tab_width = 4
+
+[*.java]
+ij_java_names_count_to_use_import_on_demand = 999
+ij_java_class_count_to_use_import_on_demand = 999
+
+[{*.yaml,*.yml}]
+indent_size = 2