add paragraph#style method to quickly set the style

ts/docx/paragraph/indent.ts

@@ -1,4 +1,4 @@
-import { XmlAttributeComponent, XmlComponent } from "../docx/xml-components";
+import { XmlAttributeComponent, XmlComponent } from "../xml-components";
 
 interface IndentAttributesProperties {
     left: number;

ts/docx/paragraph/index.ts

@@ -119,6 +119,11 @@ export class Paragraph extends XmlComponent {
         return this;
     }
 
+    public style(styleId: string): Paragraph {
+        this.properties.push(new Style(styleId));
+        return this;
+    }
+
     public indent(start: number, hanging?: number): Paragraph {
         this.properties.push(new Indent(start, hanging));
         return this;