Extract shared utilities into workspace package (#5843)

## Summary

Extracts shared formatting and network utilities into dedicated
workspace package.

## Changes

- **What**: Created `@comfyorg/shared-frontend-utils` package containing
formatUtil and networkUtil
- **Breaking**: None - utilities remain accessible via path aliases in
`tsconfig`

Split `createAnnotatedPath` and `electronMirrorCheck` out and left in
frontend, due to their tightly-coupled nature. See [discussion on this
PR](https://github.com/Comfy-Org/ComfyUI_frontend/pull/5843#issuecomment-3344724727).

scripts/collect-i18n-node-defs.ts

@@ -3,8 +3,8 @@ import * as fs from 'fs'
 import type { ComfyNodeDef } from '@/schemas/nodeDefSchema'
 
 import { comfyPageFixture as test } from '../browser_tests/fixtures/ComfyPage'
+import { normalizeI18nKey } from '../packages/shared-frontend-utils/src/formatUtil'
 import type { ComfyNodeDefImpl } from '../src/stores/nodeDefStore'
-import { normalizeI18nKey } from '../src/utils/formatUtil'
 
 const localePath = './src/locales/en/main.json'
 const nodeDefsPath = './src/locales/en/nodeDefs.json'