chore: 🔧 added editorconfig

Don't ask me why it wasn't there before...

.editorconfig

@@ -0,0 +1,12 @@
+# This ensures your code style preferences are enforced no matter what editor you and your contributors use!
+# They'll need to install the Editorconfig extension in their editr of choice first though.
+
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+end_of_line = lf

examples/showcase/app/main.js

@@ -1,6 +1,6 @@
 import init, { run } from "./pkg/perseus_showcase_app.js";
 async function main() {
-  await init("/.perseus/bundle.wasm");
-  run();
+    await init("/.perseus/bundle.wasm");
+    run();
 }
 main();