chore: copy editorconfig from frappe

.editorconfig

@@ -0,0 +1,21 @@
+# Root editor config file
+root = true
+
+# Common settings
+[*]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+charset = utf-8
+
+# python, js indentation settings
+[{*.py,*.js,*.vue,*.css,*.scss,*.html}]
+indent_style = tab
+indent_size = 4
+max_line_length = 99
+
+# JSON files - mostly doctype schema files
+[{*.json}]
+insert_final_newline = false
+indent_style = space
+indent_size = 2