feat: add pony preset and vae downloads

uses default SDXL VAE, but the model doesn't include it

presets/.gitignore

@@ -3,5 +3,6 @@
 !default.json
 !lcm.json
 !playground_v2.5.json
+!pony_v6.json
 !realistic.json
 !sai.json

presets/pony_v6.json

@@ -0,0 +1,51 @@
+{
+    "default_model": "ponyDiffusionV6XL.safetensors",
+    "default_refiner": "None",
+    "default_refiner_switch": 0.5,
+    "default_vae": "ponyDiffusionV6XL_vae.safetensors",
+    "default_loras": [
+        [
+            true,
+            "None",
+            1.0
+        ],
+        [
+            true,
+            "None",
+            1.0
+        ],
+        [
+            true,
+            "None",
+            1.0
+        ],
+        [
+            true,
+            "None",
+            1.0
+        ],
+        [
+            true,
+            "None",
+            1.0
+        ]
+    ],
+    "default_cfg_scale": 7.0,
+    "default_sample_sharpness": 2.0,
+    "default_sampler": "dpmpp_2m_sde_gpu",
+    "default_scheduler": "karras",
+    "default_performance": "Speed",
+    "default_prompt": "score_9, score_8_up, score_7_up, ",
+    "default_prompt_negative": "score_6, score_5, score_4, censored",
+    "default_styles": [],
+    "default_aspect_ratio": "896*1152",
+    "default_overwrite_step": -1,
+    "checkpoint_downloads": {
+        "ponyDiffusionV6XL.safetensors": "https://huggingface.co/mashb1t/fav_models/resolve/main/fav/ponyDiffusionV6XL.safetensors"
+    },
+    "embeddings_downloads": {},
+    "lora_downloads": {},
+    "vae_downloads": {
+        "ponyDiffusionV6XL_vae.safetensors": "https://huggingface.co/mashb1t/fav_models/resolve/main/fav/ponyDiffusionV6XL_vae.safetensors"
+    }
+}