feat: enhance canvas functionality with scissors mode and node template updates

- Implemented visual feedback and cursor changes for scissors mode in dark and light themes, improving user interaction during edge manipulation.
- Updated node template picker to include new keywords for AI image generation, enhancing searchability.
- Renamed and categorized node types for clarity, including updates to asset and prompt nodes.
- Added support for video nodes and adjusted related components for improved media handling on the canvas.

lib/canvas-node-templates.ts

@@ -15,7 +15,7 @@ export const CANVAS_NODE_TEMPLATES = [
   },
   {
     type: "prompt",
-    label: "Prompt",
+    label: "KI-Bild",
     width: 320,
     height: 220,
     defaultData: { prompt: "", model: "", aspectRatio: "1:1" },