Fix related topics validation - use existing GitHub topics

- Replace non-existent topics (ai-coding, developer-tools, artificial-intelligence)
- Use existing topics: ai, cli, terminal, developer-experience, automation
- All related topics now validated to exist in GitHub explore repository
- Maintains strategic positioning while ensuring test compliance

Author: bdmorin

topics/claude-code/index.md

@@ -3,7 +3,7 @@ aliases: [claude-cli, anthropic-claude-code, claude-code-cli, ai-terminal, intel
 created_by: Anthropic
 display_name: Claude Code
 github_url: https://github.com/anthropics/claude-code
-related: [ai-coding, developer-tools, cli, artificial-intelligence, terminal]
+related: [ai, cli, terminal, developer-experience, automation]
 released: May 22, 2025
 short_description: "Claude Code is the foundational command-line interface that brings AI assistance to software development."
 topic: claude-code