chore: Bump version to 2.7.1 for hotfix release

Version Bump:
- pyproject.toml: 2.8.0-dev → 2.7.1
- src/skill_seekers/__init__.py: 2.8.0-dev → 2.7.1
- src/skill_seekers/cli/__init__.py: 2.8.0-dev → 2.7.1
- src/skill_seekers/mcp/__init__.py: 2.8.0-dev → 2.7.1
- src/skill_seekers/mcp/tools/__init__.py: 2.8.0-dev → 2.7.1

CHANGELOG:
- Added v2.7.1 entry documenting critical config download bug fix
- Root cause, solution, files fixed, impact, and testing documented

This hotfix resolves the critical 404 error bug when downloading configs
from the skillseekersweb.com API.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "skill-seekers"
-version = "2.8.0-dev"
+version = "2.7.1"
 description = "Convert documentation websites, GitHub repositories, and PDFs into Claude AI skills"
 readme = "README.md"
 requires-python = ">=3.10"