Cell in a table.
Check the documentation of this model on Telegram Bot API
align: Horizontal cell content alignment. Currently, must be one of "left”, "center”, or "right”.valign: Vertical cell content alignment. Currently, must be one of "top”, "middle”, or "bottom”.text (optional): Optional. Text in the cell. If omitted, then the cell is invisible.is_header (optional): Optional. True, if the cell is a header cellcolspan (optional): Optional. The number of columns the cell spans if it is bigger than 1rowspan (optional): Optional. The number of rows the cell spans if it is bigger than 1