[Feature] Implement Link Profile Analysis

[Bana0615]

Ticket: [Feature] Implement Link Profile Analysis

Description:
Add functionality to analyze the link profile of a given page. This includes identifying and counting internal, external, and nofollow links. This feature is mentioned in the README.md but not yet implemented in the analysis engine.

Acceptance Criteria:

• The analysis engine (analyzeUrl in src/lib/engine.ts) should identify and count internal links on the page.
• The analysis engine should identify and count external links on the page.
• The analysis engine should identify and count nofollow links on the page.
• The UI should display the counts for internal, external, and nofollow links.
• The "Link Profile" section should be displayed under the "On-Page" tab in the analysis results (as seen in src/app/page.tsx).

Labels: feature, enhancement