feat: Added TableCellSpacing (#3052)

* feat: Added TableCellSpacingElement

* feat: Added cellSpacing (Table-constructor, TableProperties-constructor and ITableOptions)

* feat: Added cellSpacing (ITablePropertiesOptions and constructor implementation)

* feat: Added cellSpacing (ITableRowPropertiesOptions and constructor implementation)

* feat: Added cellSpacing (Implementation Test)

---------

Co-authored-by: Philip <1760073-philip.asx@users.noreply.gitlab.com>

src/file/table/table-cell-spacing.ts

@@ -0,0 +1,39 @@
+// http://officeopenxml.com/WPtableCellSpacing.php
+import { NextAttributeComponent, XmlComponent } from "@file/xml-components";
+import { Percentage, UniversalMeasure, measurementOrPercentValue } from "@util/values";
+
+// <xsd:simpleType name="ST_TblCellSpacing">
+//   <xsd:restriction base="xsd:string">
+//     <xsd:enumeration value="nil"/>
+//     <xsd:enumeration value="dxa"/>
+//   </xsd:restriction>
+// </xsd:simpleType>
+
+export const CellSpacingType = {
+    /** Value is in twentieths of a point */
+    DXA: "dxa",
+    /** No (empty) value. */
+    NIL: "nil",
+} as const;
+
+// <xsd:complexType name="CT_TblCellSpacing">
+//     <xsd:attribute name="w" type="ST_MeasurementOrPercent"/>
+//     <xsd:attribute name="type" type="ST_TblCellSpacing"/>
+// </xsd:complexType>
+export type ITableCellSpacingProperties = {
+    readonly value: number | Percentage | UniversalMeasure;
+    readonly type?: (typeof CellSpacingType)[keyof typeof CellSpacingType];
+};
+
+export class TableCellSpacingElement extends XmlComponent {
+    public constructor({ type = CellSpacingType.DXA, value }: ITableCellSpacingProperties) {
+        super("w:tblCellSpacing");
+
+        this.root.push(
+            new NextAttributeComponent<ITableCellSpacingProperties>({
+                type: { key: "w:type", value: type },
+                value: { key: "w:w", value: measurementOrPercentValue(value) },
+            }),
+        );
+    }
+}