feature: generate pdf from actor

src/elements/column.ts

@@ -0,0 +1,36 @@
+import { AbstractElement } from './abstract-element';
+import jsPDF from 'jspdf';
+
+export class Column extends AbstractElement {
+  public elements: AbstractElement[] = [];
+
+  constructor(x: number, y: number, elements: AbstractElement[]) {
+    super(x, y);
+    this.elements = elements;
+  }
+
+  public render(doc: jsPDF, _maxWidth?: number): jsPDF {
+    const elements = this.elements ?? [];
+
+    let currentY = this.y;
+    for (let i = 0; i < elements.length; i++) {
+      const element = elements[i];
+      element.x = this.x;
+      element.y = currentY;
+      element.render(doc);
+      currentY += element.getHeight(doc) + 2;
+    }
+    return doc;
+  }
+
+  public getHeight(doc): number {
+    return this.elements
+      .map((e) => e.getHeight(doc))
+      .reduce((p, c, i) => {
+        if (i === 0) {
+          return c;
+        }
+        return p + c + 2;
+      });
+  }
+}