Function useMarketplace

Returns {
    feedStore: Writable<ListingPage>;
    loadFeed: () => Promise<void>;
    loadMine: () => Promise<void>;
    markSold: (id: number) => Promise<boolean>;
    mineStore: Writable<ListingPage>;
    postListing: (input: CreateListingInput) => Promise<Listing>;
    removeListing: (id: number) => Promise<boolean>;
    searchListings: (q: string) => Promise<ListingPage>;
    viewListing: (
        id: number,
    ) => Promise<
        Listing & { contactPhone: string | null; isOwn: boolean }
        | null,
    >;
}