Workflow links: before/after order, larger uniform thumbnails

Adds a **Workflows** section to the model card so the templates that work with these files can be opened or downloaded straight from the repo page.

- 6 templates from [Comfy-Org/workflow_templates](https://github.com/Comfy-Org/workflow_templates), all first-party (no community `templates_*` submissions) and all runnable with stock ComfyUI nodes.
- Only templates that load a **diffusion model / checkpoint** from this repo are listed; templates that only take the shared `vae` / `text_encoders` / `clip_vision` files from here are left out.
- Each row shows the template's preview thumbnail(s) at a uniform 200 px, laid out side by side under a fixed two-column grid so single- and dual-preview templates line up. Dual-preview templates show their before/after pair, labelled, in the order before → after.
- Ordered by template usage.

Replaces the previous short workflow list with the full set.

Nothing else in the README is changed.

README.md

@@ -74,6 +74,15 @@ Place the files in the following folders:
 │   │   └── minimaxh3_truman_show.safetensors
 ```
 
+## Embeddings
+
+To use the embeddings in a text prompt, invoke them in the CLIPTextEncode node by
+combining `embedding:` with the filename of the embedding like this for `minimaxh3_art_is_explosion`:
+```
+embedding:minimaxh3_art_is_explosion
+```
+Just exchange the `minimaxh3_art_is_explosion` part with the filename of the embedding you want to use.
+
 ## Workflows
 
 <table>
@@ -91,12 +100,3 @@ Place the files in the following folders:
 </table>
 
 Doc: https://docs.comfy.org/tutorials/video/minimax/minimax-h3
-
-## Embeddings
-
-To use the embeddings in a text prompt, invoke them in the CLIPTextEncode node by
-combining `embedding:` with the filename of the embedding like this for `minimaxh3_art_is_explosion`:
-```
-embedding:minimaxh3_art_is_explosion
-```
-Just exchange the `minimaxh3_art_is_explosion` part with the filename of the embedding you want to use.