[Feature] Hope to provide API to directly obtain cell value through Excel column

[lyking90]

Initial checklist

• [X] Is this really a problem?
• [X] I have searched the Github Issues for similar issues, but did not find anything.

Problem

想要获取某个单元格比如A1的值，目前获取值的方式只能通过getRange，getValue，需要先创建range才能获取数据，很麻烦。

Solution

改进getRange的入参或者提供另外的univerApi，支持直接传入单个、多个单元格然后获取到数据