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

frontend/node_modules/eslint-plugin-unicorn/index.js

@@ -0,0 +1,81 @@
+import createDeprecatedRules from './rules/utils/create-deprecated-rules.js';
+import flatConfigBase from './configs/flat-config-base.js';
+import * as rawRules from './rules/index.js';
+import {toEslintRules} from './rules/rule/index.js';
+import packageJson from './package.json' with {type: 'json'};
+
+const rules = toEslintRules(rawRules);
+
+const deprecatedRules = createDeprecatedRules({
+	'no-instanceof-array': {
+		message: 'Replaced by `unicorn/no-instanceof-builtins` which covers more cases.',
+		replacedBy: ['unicorn/no-instanceof-builtins'],
+	},
+	'no-length-as-slice-end': {
+		message: 'Replaced by `unicorn/no-unnecessary-slice-end` which covers more cases.',
+		replacedBy: ['unicorn/no-unnecessary-slice-end'],
+	},
+	'no-array-push-push': {
+		message: 'Replaced by `unicorn/prefer-single-call` which covers more cases.',
+		replacedBy: ['unicorn/prefer-single-call'],
+	},
+});
+
+const externalRules = {
+	// Covered by `unicorn/no-negated-condition`
+	'no-negated-condition': 'off',
+	// Covered by `unicorn/no-nested-ternary`
+	'no-nested-ternary': 'off',
+};
+
+const recommendedRules = Object.fromEntries(Object.entries(rules).map(([id, rule]) => [
+	`unicorn/${id}`,
+	rule.meta.docs.recommended ? 'error' : 'off',
+]));
+
+const unopinionatedRules = Object.fromEntries(Object.entries(rules).map(([id, rule]) => [
+	`unicorn/${id}`,
+	rule.meta.docs.recommended === 'unopinionated' ? 'error' : 'off',
+]));
+
+const allRules = Object.fromEntries(Object.keys(rules).map(id => [
+	`unicorn/${id}`,
+	'error',
+]));
+
+const createConfig = (rules, flatConfigName) => ({
+	...flatConfigBase,
+	name: flatConfigName,
+	plugins: {
+		unicorn,
+	},
+	rules: {
+		...externalRules,
+		...rules,
+	},
+});
+
+const unicorn = {
+	meta: {
+		name: packageJson.name,
+		version: packageJson.version,
+	},
+	rules: {
+		...rules,
+		...deprecatedRules,
+	},
+};
+
+const configs = {
+	recommended: createConfig(recommendedRules, 'unicorn/recommended'),
+	unopinionated: createConfig(unopinionatedRules, 'unicorn/unopinionated'),
+	all: createConfig(allRules, 'unicorn/all'),
+
+	// TODO: Remove this at some point. Kept for now to avoid breaking users.
+	'flat/recommended': createConfig(recommendedRules, 'unicorn/flat/recommended'),
+	'flat/all': createConfig(allRules, 'unicorn/flat/all'),
+};
+
+unicorn.configs = configs;
+
+export default unicorn;