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>

comfy_extras/nodes_video.py

@@ -73,6 +73,7 @@ class SaveVideo(io.ComfyNode):
             search_aliases=["export video"],
             display_name="Save Video",
             category="image/video",
+            essentials_category="Basics",
             description="Saves the input images to your ComfyUI output directory.",
             inputs=[
                 io.Video.Input("video", tooltip="The video to save."),
@@ -146,6 +147,7 @@ class GetVideoComponents(io.ComfyNode):
             search_aliases=["extract frames", "split video", "video to images", "demux"],
             display_name="Get Video Components",
             category="image/video",
+            essentials_category="Video Tools",
             description="Extracts all components from a video: frames, audio, and framerate.",
             inputs=[
                 io.Video.Input("video", tooltip="The video to extract components from."),
@@ -174,6 +176,7 @@ class LoadVideo(io.ComfyNode):
             search_aliases=["import video", "open video", "video file"],
             display_name="Load Video",
             category="image/video",
+            essentials_category="Basics",
             inputs=[
                 io.Combo.Input("file", options=sorted(files), upload=io.UploadType.video),
             ],