Add documentation summaries for ComfyApi and ComfyApp

Introduced two new documentation files: ComfyApi and ComfyApp. These files provide concise summaries of the main functions, properties, and event types for the ComfyApi and ComfyApp classes, aiding developers in understanding their usage and structure.

Doc/ComfyApp

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+## __Main ComfyApp Functions__ import { app, ComfyApp } from "../../scripts/app.js";
+
+### __Application Management__
+
+- `setup(canvasEl)` - Initializes the application on the page, loads extensions, registers nodes
+- `resizeCanvas()` - Adjusts canvas size to window
+- `clean()` - Clears application state (node outputs, image previews, errors)
+
+### __Workflow Management__
+
+- `loadGraphData(graphData, clean, restore_view, workflow, options)` - Loads workflow data from JSON
+- `loadApiJson(apiData, fileName)` - Loads workflow from API format
+- `graphToPrompt(graph, options)` - Converts graph to prompt for execution
+- `handleFile(file)` - Handles file loading (PNG, WebP, JSON, MP3, MP4, SVG, etc.)
+
+### __Execution__
+
+- `queuePrompt(number, batchCount, queueNodeIds)` - Queues prompt for execution
+- `registerNodes()` - Registers node definitions from backend
+- `registerNodeDef(nodeId, nodeDef)` - Registers single node definition
+- `refreshComboInNodes()` - Refreshes combo lists in nodes
+
+### __Node Management__
+
+- `registerExtension(extension)` - Registers ComfyUI extension
+- `updateVueAppNodeDefs(defs)` - Updates node definitions in Vue app
+- `revokePreviews(nodeId)` - Frees memory for node previews
+
+### __Clipboard__
+
+- `copyToClipspace(node)` - Copies node to clipboard
+- `pasteFromClipspace(node)` - Pastes data from clipboard to node
+
+### __Position Conversion__
+
+- `clientPosToCanvasPos(pos)` - Converts client position to canvas position
+- `canvasPosToClientPos(pos)` - Converts canvas position to client position
+
+### __Error Handling__
+
+- `showErrorOnFileLoad(file)` - Displays file loading error
+- `#showMissingNodesError(missingNodeTypes)` - Shows missing nodes error
+- `#showMissingModelsError(missingModels, paths)` - Shows missing models error
+
+### __Internal Handlers__
+
+- `#addDropHandler()` - Handles drag and drop of files
+- `#addProcessKeyHandler()` - Handles keyboard input
+- `#addDrawNodeHandler()` - Modifies node drawing behavior
+- `#addApiUpdateHandlers()` - Handles API updates
+- `#addConfigureHandler()` - Graph configuration flag
+- `#addAfterConfigureHandler()` - Post-configuration handling
+
+### __Deprecated Properties__
+
+Many properties are marked as deprecated and redirect to appropriate stores:
+
+- `lastNodeErrors` → `useExecutionStore().lastNodeErrors`
+- `lastExecutionError` → `useExecutionStore().lastExecutionError`
+- `runningNodeId` → `useExecutionStore().executingNodeId`
+- `shiftDown` → `useWorkspaceStore().shiftDown`
+- `widgets` → `useWidgetStore().widgets`
+- `extensions` → `useExtensionStore().extensions`
+
+### __Utility Functions__
+
+- `sanitizeNodeName(string)` - Cleans node name from dangerous characters
+- `getPreviewFormatParam()` - Returns preview format parameter
+- `getRandParam()` - Returns random parameter for refresh
+- `isApiJson(data)` - Checks if data is in API JSON format
+
+This application uses Vue and TypeScript composition pattern, where many functionalities are separated into different services and stores (e.g., `useExecutionStore`, `useWorkflowService`, `useExtensionService`, etc.).