routie dev init since i didn't adhere to any proper guidance up until now

frontend/node_modules/eslint-plugin-unicorn/rules/no-unnecessary-slice-end.js

@@ -0,0 +1,24 @@
+import {listen} from './shared/no-unnecessary-length-or-infinity-rule.js';
+
+const MESSAGE_ID = 'no-unnecessary-slice-end';
+const messages = {
+	[MESSAGE_ID]: 'Passing `{{description}}` as the `end` argument is unnecessary.',
+};
+
+/** @type {import('eslint').Rule.RuleModule} */
+const config = {
+	create(context) {
+		listen(context, {methods: ['slice'], messageId: MESSAGE_ID});
+	},
+	meta: {
+		type: 'suggestion',
+		docs: {
+			description: 'Disallow using `.length` or `Infinity` as the `end` argument of `{Array,String,TypedArray}#slice()`.',
+			recommended: 'unopinionated',
+		},
+		fixable: 'code',
+		messages,
+	},
+};
+
+export default config;