fix(docs): align usage imports to components/ui paths

[Yeom-JinHo]

Description

This PR fixes the import-path mismatch reported in #881 by aligning docs usage snippets with the actual install target path.

The issue was that some docs showed imports from @/registry/magicui/*, while installed components are intended to be imported from @/components/ui/*.

Changes

• Updated usage imports in docs from @/registry/magicui/* to @/components/ui/*.
• Fixed the following component docs:
  • magic-card
  • video-text
  • pixel-image
  • shine-border
• Verified there are no remaining @/registry/magicui/* usage imports in content/docs and content/blog.

Motivation

• Prevent copy-paste errors for users following docs.
• Keep import examples consistent with generated/installed component paths.
• Reduce confusion between internal registry source paths and consumer-facing app import paths.

Breaking Changes

• None.
• This change only updates documentation examples and does not modify runtime component behavior.

[vercel]

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[1chooo]

LGTM! All the paths have been updated