add editorconfig

Author: fkromer

.editorconfig

@@ -0,0 +1,33 @@
+# https://spec.editorconfig.org/
+
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.py]
+indent_style = space
+indent_size = 4
+
+[*.robot]
+indent_style = space
+indent_size = 4
+
+[*.json]
+indent_style = space
+indent_size = 2
+
+[*.{yml,yaml}]
+indent_style = space
+indent_size = 2
+
+[*.html]
+indent_style = space
+indent_size = 2
+
+[*.html]
+indent_style = space
+indent_size = 2