feat: support EditorConfig https://editorconfig.org (#2149)

.editorconfig

@@ -0,0 +1,22 @@
+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a final newline; trim trailing whitespace
+[*]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+# Set default charset for sources
+[*.{html,js,py,pyx}]
+charset = utf-8
+
+# 4 space indentation
+[*.{py,pyx}]
+indent_style = space
+indent_size = 4
+
+# 2 space indentation
+[*.{yaml,yml}]
+indent_style = space
+indent_size = 2