Add functionality to get multiple items by a title

[edif2008]

Summary

We want to enhance the way users can get items when using the Connect Node SDK. In this issue, we want to enable users to get a list of items that have the given title.

Tasks to be done

• Implement listItemsByTitle function in the Items class in src/lib/resources.ts. Important note: The API response returns an Item summary, not the full item, therefore once you get the list of item summaries, for each item you have to call getItemById.

  /**
   * Search for all Items with an exact match on title.
   *
   * @param {string} title
   * @returns {Promise<FullItem[]>}
   * @private
   */
  private async listItemssByTitle(
           vaultId: string,
           title: string,
       ): Promise<Response> {
       // functionality
  }

  Tip: You can move this snippet from get to listItemsByTitle and then call listItemsByTitle in get. In this way, you avoid duplicate code in the two function.
• Implement listItemsByTitle function in OPConnect class in src/lib/op-connect.ts:

  /**
   * Returns a list of Items with a matching Title value.
   *
   * @param {string} vaultId
   * @param {string} itemTitle
   * @returns {Promise<FullItem[]>}
   */
  public async listItemsByTitle(vaultId: string, itemTitle: string): Promise<FullItem[]> {
        return await this.items.listItemsByTitle(vaultId, itemTitle);
  }

• Add a test for the new function in __test__/op-connect.test.ts below get item test case:

  test("list items by titte", async () => {
      // actual test here
  }