docs: Reorganize and expand ComfyUI image-generation docs

- Move all image-generation content into docs/image-generation-and-editing/
- Add ComfyUI image-editing instructions (Image Size, Steps, Image Prompt Generation)
- Explain how to set node IDs in Open WebUI
- Add example setups for Qwen and FLUX.1 models
- Fix broken links and tidy formatting

docs/tutorials/speech-to-text/_category_.json

@@ -1,5 +1,5 @@
 {
-	"label": "🎤 Speech To Text",
+	"label": "🎙️ Speech To Text",
 	"position": 5,
 	"link": {
 		"type": "generated-index"

docs/tutorials/speech-to-text/env-variables.md

@@ -1,6 +1,6 @@
 ---
 sidebar_position: 2
-title: "Environment Variables"
+title: "🌍 Environment Variables"
 ---
 
 ## Environment Variables List

docs/tutorials/speech-to-text/stt-config.md

@@ -1,6 +1,6 @@
 ---
 sidebar_position: 1
-title: "🗨️  Configuration"
+title: "⚙️ Configuration"
 ---
 
 Open Web UI supports both local, browser, and remote speech to text.