Refactor frontend to use commands

frontend/src/scripts/commands/types/before-destroy.ts

@@ -0,0 +1,7 @@
+import { Command } from 'shared';
+
+export class BeforeDestroyCommand extends Command {
+  public constructor() {
+    super();
+  }
+}

frontend/src/scripts/commands/types/render.ts

@@ -0,0 +1,13 @@
+import { vec2 } from 'gl-matrix';
+import { Renderer } from 'sdf-2d';
+import { Command } from 'shared';
+
+export class RenderCommand extends Command {
+  public constructor(
+    public readonly renderer: Renderer,
+    public readonly overlay: HTMLElement,
+    public readonly shouldChangeLayout: boolean,
+  ) {
+    super();
+  }
+}

frontend/src/scripts/commands/types/step.ts

@@ -0,0 +1,7 @@
+import { Command } from 'shared';
+
+export class StepCommand extends Command {
+  public constructor(public readonly deltaTimeInSeconds: number) {
+    super();
+  }
+}