Fix: separate vertical alignment enums for ITableCellOptions and ISectionPropertiesOptions (#3079)

* fix: separate vertical alignment enums for table and section properties

- Introduced `VerticalAlignTable` for table-cell vertical alignment with valid values: `top`, `center`, and `bottom`.
- Added `VerticalAlignSection` for section properties, extending `VerticalAlignTable` with an additional value `both`.
- Marked the original `VerticalAlign` as deprecated for backward compatibility, directing users to the new enums.
- Updated type definitions for better clarity on valid vertical alignments.

* refactor: update vertical alignment imports and types for section and table properties

- Renamed `VerticalAlign` to `VerticalAlignSection` in section properties and `VerticalAlignTable` in table-cell properties for clarity.
- Updated type definitions to reflect the new enum names, ensuring better organization and understanding of vertical alignment options.
- Adjusted related test cases to utilize the new imports and types.

* refactor: update demos to use new enums for table and section properties for vertical alignment

docs/usage/tables.md

@@ -159,7 +159,7 @@ const tableRow = new TableRow({
 | children      | `Array<Paragraph or Table>`         | Required. You can nest tables by adding a table into a cell |
 | shading       | `IShadingAttributesProperties`      | Optional                                                    |
 | margins       | `ITableCellMarginOptions`           | Optional                                                    |
-| verticalAlign | `VerticalAlign`                     | Optional                                                    |
+| verticalAlign | `VerticalAlignTable`                | Optional                                                    |
 | columnSpan    | `number`                            | Optional                                                    |
 | rowSpan       | `number`                            | Optional                                                    |
 | borders       | `BorderOptions`                     | Optional                                                    |
@@ -266,7 +266,7 @@ Sets the vertical alignment of the contents of the cell
 ```ts
 const cell = new TableCell({
     ...,
-    verticalAlign: VerticalAlign,
+    verticalAlign: VerticalAlignTable,
 });
 ```
 
@@ -282,7 +282,7 @@ For example, to center align a cell:
 
 ```ts
 const cell = new TableCell({
-    verticalAlign: VerticalAlign.CENTER,
+    verticalAlign: VerticalAlignTable.CENTER,
 });
 ```