Add editorconfig

.editorconfig

@@ -0,0 +1,21 @@
+root = true
+
+[*.{py,toml,yml,md}]
+indent_style = space
+end_of_line = lf
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.py]
+max_line_length = 88
+indent_size = 4
+
+[*.toml]
+indent_size = 4
+
+[*.yml]
+indent_size = 4
+
+[*.md]
+max_line_length = 0
+indent_size = 4