feat: add essentials_category (#12357)

* feat: add essentials_category field to node schema

Amp-Thread-ID: https://ampcode.com/threads/T-019c2b25-cd90-7218-9071-03cb46b351b3

* feat: add ESSENTIALS_CATEGORY to core nodes

Marked nodes:
- Basic: LoadImage, SaveImage, LoadVideo, SaveVideo, Load3D, CLIPTextEncode
- Image Tools: ImageScale, ImageInvert, ImageBatch, ImageCrop, ImageRotate, ImageBlur
- Image Tools/Preprocessing: Canny
- Image Generation: LoraLoader
- Audio: LoadAudio, SaveAudio

Amp-Thread-ID: https://ampcode.com/threads/T-019c2b25-cd90-7218-9071-03cb46b351b3

* Add ESSENTIALS_CATEGORY to more nodes

- SaveGLB (Basic)
- GetVideoComponents (Video Tools)
- TencentTextToModelNode, TencentImageToModelNode (3D)
- RecraftRemoveBackgroundNode (Image Tools)
- KlingLipSyncAudioToVideoNode (Video Generation)
- OpenAIChatNode (Text Generation)
- StabilityTextToAudio (Audio)

Amp-Thread-ID: https://ampcode.com/threads/T-019c2b69-81c1-71c3-8096-450a39e20910

* fix: correct essentials category for Canny node

Amp-Thread-ID: https://ampcode.com/threads/T-019c7303-ab53-7341-be76-a5da1f7a657e
Co-authored-by: Amp <amp@ampcode.com>

* refactor: replace essentials_category string literals with constants

Amp-Thread-ID: https://ampcode.com/threads/T-019c7303-ab53-7341-be76-a5da1f7a657e
Co-authored-by: Amp <amp@ampcode.com>

* refactor: revert constants, use string literals for essentials_category

Amp-Thread-ID: https://ampcode.com/threads/T-019c7303-ab53-7341-be76-a5da1f7a657e
Co-authored-by: Amp <amp@ampcode.com>

* fix: update basics

---------

Co-authored-by: bymyself <cbyrne@comfy.org>
Co-authored-by: Amp <amp@ampcode.com>
Co-authored-by: Jedrzej Kosinski <kosinkadink1@gmail.com>

server.py

@@ -689,6 +689,10 @@ class PromptServer():
                 info['api_node'] = obj_class.API_NODE
 
             info['search_aliases'] = getattr(obj_class, 'SEARCH_ALIASES', [])
+
+            if hasattr(obj_class, 'ESSENTIALS_CATEGORY'):
+                info['essentials_category'] = obj_class.ESSENTIALS_CATEGORY
+
             return info
 
         @routes.get("/object_info")