numbering: add support to define suffix for numbering level

src/file/numbering/index.ts

@@ -1,2 +1,3 @@
 export * from "./numbering";
 export * from "./abstract-numbering";
+export * from "./level";

src/file/numbering/level.ts

@@ -60,6 +60,23 @@ class LevelJc extends XmlComponent {
     }
 }
 
+export enum LevelSuffix {
+    NOTHING = "nothing",
+    SPACE = "space",
+    TAB = "tab",
+}
+
+class Suffix extends XmlComponent {
+    constructor(value: LevelSuffix) {
+        super("w:suff");
+        this.root.push(
+            new Attributes({
+                val: value,
+            }),
+        );
+    }
+}
+
 export class LevelBase extends XmlComponent {
     private readonly paragraphProperties: ParagraphProperties;
     private readonly runProperties: RunProperties;
@@ -93,6 +110,11 @@ export class LevelBase extends XmlComponent {
         this.root.push(this.runProperties);
     }
 
+    public setSuffix(value: LevelSuffix) {
+        this.root.push(new Suffix(value));
+        return this;
+    }
+
     public addParagraphProperty(property: XmlComponent): Level {
         this.paragraphProperties.push(property);
         return this;