add all frontend files

node_modules/rc-select/lib/utils/valueUtil.d.ts

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+import type { BaseOptionType, DefaultOptionType } from '../Select';
+import type { FieldNames } from '../Select';
+import type { FlattenOptionData } from '../interface';
+export declare function isValidCount(value?: number): boolean;
+export declare function fillFieldNames(fieldNames: FieldNames | undefined, childrenAsData: boolean): {
+    label: string;
+    value: string;
+    options: string;
+    groupLabel: string;
+};
+/**
+ * Flat options into flatten list.
+ * We use `optionOnly` here is aim to avoid user use nested option group.
+ * Here is simply set `key` to the index if not provided.
+ */
+export declare function flattenOptions<OptionType extends BaseOptionType = DefaultOptionType>(options: OptionType[], { fieldNames, childrenAsData }?: {
+    fieldNames?: FieldNames;
+    childrenAsData?: boolean;
+}): FlattenOptionData<OptionType>[];
+/**
+ * Inject `props` into `option` for legacy usage
+ */
+export declare function injectPropsWithOption<T extends object>(option: T): T;
+export declare const getSeparatedContent: (text: string, tokens: string[], end?: number) => string[];