Recreate the Dreaming task router as a repository skill #57520

Add a repository skill at .github/skills/dreaming/SKILL.md that recreates the Dreaming task router.

Requirements

• Use valid skill frontmatter with the name dreaming and a concise description.
• Select the matching Dreaming task from the supplied problem statement.
• Route repository workflow-mining requests to repository-skill-forge.
• Route deterministic session-store and pull-request publication health checks to session-smoke-test.
• Load and execute the selected task skill inline in the current top-level agent; do not delegate it to a sub-agent.
• Preserve access to top-level progress reporting and pull-request creation tools.
• Open at most one pull request per run.
• Reject unsupported Dreaming requests explicitly instead of guessing.
• Follow conventions used by existing skills under .github/skills/.

Keep the change limited to the new skill and directly related validation or documentation. Run the repository's existing checks for skill changes before publishing the pull request.