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

frontend/node_modules/eslint-plugin-perfectionist/dist/utils/is-newlines-between-option.d.ts

@@ -0,0 +1,40 @@
+import {
+  GroupNewlinesBetweenOption,
+  GroupsOptions,
+} from '../types/common-groups-options.js'
+/**
+ * Type guard to check if a group option is a newlines-between configuration.
+ *
+ * Determines whether a group element contains a `newlinesBetween` property,
+ * which indicates it's a special configuration object that controls spacing
+ * between groups rather than being a regular group name or comment option.
+ *
+ * Newlines-between options are placed between group names in the configuration
+ * to specify how many newlines should separate those groups in the sorted
+ * output.
+ *
+ * @example
+ *
+ * ```ts
+ * const groups = [
+ *   'imports',
+ *   { newlinesBetween: 1 }, // Add 1 newline between imports and types
+ *   'types',
+ *   { newlinesBetween: 2 }, // Add 2 newlines between types and components
+ *   'components',
+ *   { commentAbove: '// Utils' }, // Not a newlines option
+ *   'utils',
+ * ]
+ *
+ * isNewlinesBetweenOption(groups[0]) // false (string)
+ * isNewlinesBetweenOption(groups[1]) // true (has newlinesBetween)
+ * isNewlinesBetweenOption(groups[3]) // true (has newlinesBetween)
+ * isNewlinesBetweenOption(groups[5]) // false (comment option)
+ * ```
+ *
+ * @param groupOption - A single element from the groups configuration array.
+ * @returns True if the element is a newlines-between configuration object.
+ */
+export declare function isNewlinesBetweenOption(
+  groupOption: GroupsOptions[number],
+): groupOption is GroupNewlinesBetweenOption