chore: checkpoint before Python removal

vendor/iri-string/.editorconfig

@@ -0,0 +1,16 @@
+root = true
+
+# Use rustfmt (not editorconfig) to format Rust sources.
+
+[*.{toml,yaml,yml}]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.toml]
+indent_size = 4
+
+[*.{yaml,yml}]
+indent_size = 2
+indent_style = space