fix: Update test imports for new package structure

Updated 8 test files to use new skill_seekers.* imports:
- test_async_scraping.py
- test_estimate_pages.py
- test_package_skill.py
- test_parallel_scraping.py
- test_unified.py
- test_unified_mcp_integration.py
- test_upload_skill.py
- test_utilities.py

Changed:
- from cli.* → from skill_seekers.cli.*
- from skill_seeker_mcp.* → from skill_seekers.mcp.*
- Removed obsolete sys.path.insert() calls

Result:
- 364/389 tests passing (93.5% pass rate)
- Remaining 25 failures are path-related tests that need
  updating for new unified CLI commands (will fix next)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

tests/test_package_skill.py

@@ -9,10 +9,7 @@ import zipfile
 from pathlib import Path
 import sys
 
-# Add cli directory to path
-sys.path.insert(0, str(Path(__file__).parent.parent / 'cli'))
-
-from package_skill import package_skill
+from skill_seekers.cli.package_skill import package_skill
 
 
 class TestPackageSkill(unittest.TestCase):