fix(dashboard): resolve CMS content source paths in config

- Fix homepage and docs content source root paths from 'cms/content/*' to 'src/lib/cms/content/*'
- Paths are relative to process.cwd() and need the full path from project root
- Resolves ENOENT errors when reading markdown directories

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

dashboard/src/lib/cms/config.ts

@@ -36,11 +36,11 @@ export const cmsConfig: CmsConfig = {
     sources: {
       homepage: {
         type: 'filesystem',
-        root: 'cms/content/homepage',
+        root: 'src/lib/cms/content/homepage',
       },
       docs: {
         type: 'filesystem',
-        root: 'cms/content/docs',
+        root: 'src/lib/cms/content/docs',
       },
       marketing: {
         type: 'git',