Add CI validation for OSS assets (fonts and licenses) (#8828)

## Summary
Adds CI workflow to validate OSS build compliance by checking for
proprietary fonts and non-approved dependency licenses.

## Context
- Part of comprehensive OSS compliance effort (split from closed PR
#6777)
- Uses simple bash/grep approach following proven #8623 pattern
- Complements telemetry checking in PR #8826 and existing #8354

## Implementation

### Font Validation
- Scans dist/ for proprietary ABCROM fonts (.woff, .woff2, .ttf, .otf)
- Fails if any ABCROM fonts found in OSS builds
- Provides clear fix instructions

### License Validation  
- Uses `license-checker` npm package
- Validates all production dependencies
- Only allows OSI-approved licenses:
  - MIT, Apache-2.0, BSD-2-Clause, BSD-3-Clause, ISC
  - 0BSD, BlueOak-1.0.0, Python-2.0, CC0-1.0
  - Unlicense, CC-BY-4.0, CC-BY-3.0
  - Common dual-license combinations

### Workflow Details
- Two separate jobs for parallel execution
- Runs on PRs and pushes to main/dev
- Builds with `DISTRIBUTION=localhost` for OSS mode
- Clear error messages with remediation steps

## Testing
- [ ] Font check passes on current main (no ABCROM fonts in dist)
- [ ] License check passes on current main (all approved licenses)
- [ ] Intentional violation testing

## Related
- Supersedes remaining parts of closed PR #6777
- Complements PR #8826 (Mixpanel telemetry)
- Follows pattern from PR #8623 (simple bash/grep)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8828-Add-CI-validation-for-OSS-assets-fonts-and-licenses-3056d73d3650812390d5d91ca2f319fc)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>
Co-authored-by: bymyself <cbyrne@comfy.org>

src/router.ts

@@ -17,7 +17,11 @@ import LayoutDefault from '@/views/layouts/LayoutDefault.vue'
 
 import { installPreservedQueryTracker } from '@/platform/navigation/preservedQueryTracker'
 import { PRESERVED_QUERY_NAMESPACES } from '@/platform/navigation/preservedQueryNamespaces'
-import { cloudOnboardingRoutes } from './platform/cloud/onboarding/onboardingCloudRoutes'
+
+const cloudOnboardingRoutes = isCloud
+  ? (await import('./platform/cloud/onboarding/onboardingCloudRoutes'))
+      .cloudOnboardingRoutes
+  : []
 
 const isFileProtocol = window.location.protocol === 'file:'