Clean up and restructure JavaScript REPL description following consistent pattern:
- Purpose section
- When to Use section
- Environment section
- Common Libraries section
- Important Notes section
- Example section
Removed buildJavaScriptReplDescription() function - no longer dynamically
injecting runtime provider docs into tool description (will move to system prompt).
Changes:
- Replace JAVASCRIPT_REPL_BASE_DESCRIPTION with JAVASCRIPT_REPL_DESCRIPTION
- Remove JAVASCRIPT_REPL_CHART_EXAMPLE and JAVASCRIPT_REPL_FOOTER
- Remove buildJavaScriptReplDescription() function
- Update javascript-repl tool to use static description
- Simpler, more scannable structure with clear hierarchy
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