[Feature Request]: Keybindings presets (Blender)

### Is there an existing issue for this?

- [x] I have searched the existing issues and checked the recent builds/commits

### What would your feature do ?

This is a https://github.com/Comfy-Org/ComfyUI_frontend/issues/1082 sub-task.

This task is dedicated to Blender-compatible keybindings preset.

### Proposed workflow

Blender node keybindings:

Mouse wheel up - zoom in
Mouse wheel down - zoom out
MMB + drag - viewport pan
RMB click - context menu
SHIFT + A - add node menu
SHIFT + D - duplicate selected nodes
LMB on a node - select node
LMB + drag - box select nodes
CTRL + MMB (press and drag) - zoom in/out
G (after selecting nodes) - move nodes
S (after selecting nodes) - scale nodes
R (after selecting nodes) - rotate nodes
M - mute node
CTRL + RMB drag - cut node link
SHIFT + RMB drag - insert reroute
ALT + RMB drag - lazy connect 2 nodes
ALT + S - swap links (select 2 input nodes first)
CTRL + SHIFT drag over 2 nodes - add mix node from them both
SHIFT + ALT drag over 2 nodes - connect selected sockets
CTRL + SHIFT + LMB click on node - connect selected node to a viewer
/ - add reroute after empty node outputs

### Additional information

Keybinding presets are a long-term goal, but it would be good to gather all the information beforehand.
Between the most used node editors, there isn't 100% overlap in functionality, and comparing industry node keymaps might help with deciding what functionalities are needed in ComfyUI.

┆Issue is synchronized with this [Notion page](https://www.notion.so/Issue-2537-Feature-Request-Keybindings-presets-Blender-1986d73d36508179aefed5fb6b4a5d84) by [Unito](https://www.unito.io)

Start by reviewing the linked ComfyUI_frontend issue #1082 and the Blender keybinding list in this issue. No implementation files, tests, or entry point are identified, so first determine where keybinding presets belong and which listed interactions are supported. Done should be a defined Blender-compatible preset with agreed functionality and validation criteria.

Written by the indexing model from the issue text.