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/scripts_comfy/README.md

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+Here lies dummy ts files that decalre/export ComfyUI's own scripts files as typed types w/o needing
+to symlink to the actual implementation.
+
+Actual code in the comfyui/ directory can import these like `import {app} from "/scripts/app.js"`
+and have access to `app` as the fully typed `ComfyApp`. The `__build__.py` script will rewrite these
+to the relative browser path.

custom_nodes/rgthree-comfy/src_web/scripts_comfy/api.ts

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+interface ComfyApi extends EventTarget {
+  api_base: string;
+  getNodeDefs(): any;
+  apiURL(url: string): string;
+  queuePrompt(num: number, data: { output: {}; workflow: {} }): Promise<{}>;
+  fetchApi(route: string, options?: RequestInit) : Promise<Response>;
+  interrupt(): void;
+}
+
+export declare const api: ComfyApi;

custom_nodes/rgthree-comfy/src_web/scripts_comfy/app.ts

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+import {ComfyApp} from "@comfyorg/frontend";
+
+/**
+ * A dummy ComfyApp that we can import from our code, which we'll rewrite later to the comfyui
+ * hosted app.js
+ */
+export declare const app: ComfyApp;

custom_nodes/rgthree-comfy/src_web/scripts_comfy/widgets.ts

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+import type {ComfyApp, IStringWidget, IComboWidget, IWidget, LGraphNode} from "@comfyorg/frontend";
+
+type ComfyWidgetFn<WidgetType extends IWidget> = (
+  node: LGraphNode,
+  inputName: string,
+  inputData: any,
+  app: ComfyApp,
+) => {widget: WidgetType};
+
+/**
+ * A dummy ComfyWidgets that we can import from our code, which we'll rewrite later to the comfyui
+ * hosted widgets.js
+ */
+export declare const ComfyWidgets: {
+  COMBO: ComfyWidgetFn<IComboWidget>;
+  STRING: ComfyWidgetFn<IStringWidget>;
+  [key: string]: ComfyWidgetFn<IWidget>;
+};