add: Make Table and Column clonable

Author: Nukesor

src/column.rs

@@ -27,7 +27,7 @@ use crate::style::{CellAlignment, ColumnConstraint};
 /// // Align content in all cells of this column to the center of the cell.
 /// column.set_cell_alignment(CellAlignment::Center);
 /// ```
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct Column {
     /// The index of the column
     pub index: usize,

src/table.rs

@@ -21,7 +21,7 @@ use crate::utils::build_table;
 ///
 /// There also exists a representation of a [Column].
 /// Columns are automatically created when adding rows to a table.
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct Table {
     pub(crate) columns: Vec<Column>,
     style: HashMap<TableComponent, char>,