fix: link correct helix blog

[mezotv]

Links to the correct blog and removes the unused blog page!

Greptile Overview

Greptile Summary

This PR cleans up the documentation by removing unused internal blog placeholder pages and redirecting users to the live external blog at https://helix-db.com/blog.

• Deleted blogs/kg.mdx and blogs/overview.mdx which contained "Coming Soon!" placeholder content
• Updated the "Blogs" card link in documentation/getting-started/intro.mdx to point to the external blog
• No broken references remain in the codebase

Important Files Changed

File Analysis

Filename	Score	Overview
blogs/kg.mdx	5/5	Removed unused "Coming Soon!" blog placeholder page
blogs/overview.mdx	5/5	Removed unused blog overview page that linked to internal placeholder
documentation/getting-started/intro.mdx	5/5	Updated blog card link from internal placeholder to external blog site

Sequence Diagram

sequenceDiagram
    participant User
    participant IntroPage as intro.mdx
    participant OldBlog as blogs/overview.mdx (deleted)
    participant KGBlog as blogs/kg.mdx (deleted)
    participant ExternalBlog as helix-db.com/blog

    Note over User,ExternalBlog: Before: Internal placeholder blog
    User->>IntroPage: Click "Blogs" card
    IntroPage->>OldBlog: Navigate to ../../blogs/overview
    OldBlog->>KGBlog: Link to kg.mdx
    Note over KGBlog: "Coming Soon!" placeholder

    Note over User,ExternalBlog: After: External blog redirect
    User->>IntroPage: Click "Blogs" card
    IntroPage->>ExternalBlog: Navigate to https://helix-db.com/blog
    Note over ExternalBlog: Live blog with content

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