Add custom nodes, Civitai loras (LFS), and vast.ai setup script

Includes 30 custom nodes committed directly, 7 Civitai-exclusive
loras stored via Git LFS, and a setup script that installs all
dependencies and downloads HuggingFace-hosted models on vast.ai.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

custom_nodes/rgthree-comfy/src_web/comfyui/testing/utils_test.ts

@@ -0,0 +1,41 @@
+import type {LGraphNode} from "@comfyorg/frontend";
+import type {ComfyUITestEnvironment} from "./comfyui_env";
+
+export const PNG_1x1 =
+  "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVQIW2P4v5ThPwAG7wKklwQ/bwAAAABJRU5ErkJggg==";
+export const PNG_1x2 =
+  "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAACCAYAAACZgbYnAAAAEElEQVQIW2NgYGD4D8QM/wEHAwH/OMSHKAAAAABJRU5ErkJggg==";
+export const PNG_2x1 =
+  "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAABCAYAAAD0In+KAAAAD0lEQVQIW2NkYGD4D8QMAAUNAQFqjhCLAAAAAElFTkSuQmCC";
+
+export async function pasteImageToLoadImageNode(
+  env: ComfyUITestEnvironment,
+  dataUrl?: string,
+  node?: LGraphNode,
+) : Promise<LGraphNode> {
+  const dataArr = (dataUrl ?? PNG_1x1).split(",");
+  const mime = dataArr[0]!.match(/:(.*?);/)![1];
+  const bstr = atob(dataArr[1]!);
+  let n = bstr.length;
+  const u8arr = new Uint8Array(n);
+  while (n--) {
+    u8arr[n] = bstr.charCodeAt(n);
+  }
+  const filename = `test_image_${+new Date()}.png`;
+  const file = new File([u8arr], filename, {type: mime});
+  if (!node) {
+    node = await env.addNode("LoadImage");
+  }
+  await (node as any).pasteFiles([file]);
+  let i = 0;
+  let good = false;
+  while (i++ < 10 || good) {
+    good = node.widgets![0]!.value === filename;
+    if (good) break;
+    await env.wait(100);
+  }
+  if (!good) {
+    throw new Error("Expected file not loaded.");
+  }
+  return node;
+}