fix: cleanup deduplicate comparison tables

[thegdsks]

Summary

• Remove duplicate comparison table from README (kept the compact one, removed the verbose one)
• Updated Discussion Stacklit vs Repomix vs code2prompt vs Aider repo-map — full comparison of AI codebase context tools #13 body to match

Ran humanizer audit - no other AI patterns found.

[Copilot]

Pull request overview

This PR standardizes punctuation in the documentation by replacing em dashes with regular dash separators, and removes a duplicate comparison table from the README to avoid redundancy.

Changes:

• Replaced em dashes with regular dash separators across README.md and COMPARISON.md.
• Removed the verbose “Compared to alternatives” table from README.md (kept the compact comparison section/link).

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 9 comments.

File	Description
README.md	Replaces em dashes in the manual setup section and removes the duplicate “Compared to alternatives” comparison table.
COMPARISON.md	Replaces em dashes with regular dash separators across headings, prose, and a code block comment.

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[Copilot]

There are two spaces before the dash separator ("Claude Code␠␠-") which reads like a formatting typo and is inconsistent with other separators in this README (many places use " -- "). Consider using a single-space separator and/or matching the existing " -- " style.