Export new ColumnBreak class via more generic Break class

src/file/paragraph/formatting/break.ts

@@ -0,0 +1,43 @@
+// http://officeopenxml.com/WPtextSpecialContent-break.php
+import { Attributes, XmlComponent } from "file/xml-components";
+import { Run } from "../run";
+
+enum BreakType {
+    COLUMN = "column",
+    PAGE = "page",
+    // textWrapping breaks are the default and already exposed via the "Run" class
+}
+
+class Break extends XmlComponent {
+    constructor(type: BreakType) {
+        super("w:br");
+        this.root.push(
+            new Attributes({
+                type,
+            }),
+        );
+    }
+}
+
+export class PageBreak extends Run {
+    constructor() {
+        super({});
+        this.root.push(new Break(BreakType.PAGE));
+    }
+}
+
+export class ColumnBreak extends Run {
+    constructor() {
+        super({});
+        this.root.push(new Break(BreakType.COLUMN));
+    }
+}
+
+/**
+ * Add page break before the paragraph if there is no one added before.
+ */
+export class PageBreakBefore extends XmlComponent {
+    constructor() {
+        super("w:pageBreakBefore");
+    }
+}