feat: properly include README and config.yaml.example in package (Fixes #32)

[KHolodilin]

Description

Ensure that README.md and config.yaml.example are included in the built package distribution and accessible in installed package:

1. Add config.yaml.example to email_processor package directory
2. Add README.md to email_processor package directory
3. Configure package-data in pyproject.toml
4. Update config.py to find config.yaml.example in package using importlib.resources
5. Keep MANIFEST.in for additional files (LICENSE)

Changes

• Created MANIFEST.in to include README.md, LICENSE, and config.yaml.example
• Added config.yaml.example to email_processor/ package directory
• Added README.md to email_processor/ package directory
• Configured package-data in pyproject.toml to include files in package
• Updated email_processor/cli/commands/config.py to find config.yaml.example in package using importlib.resources
• Applied pre-commit fixes (line endings)
• Bumped version to 8.0.5

Testing

• ✅ All tests pass (763 tests)
• ✅ Pre-commit checks pass
• ✅ Ruff check passes
• ✅ MANIFEST.in created with required files
• ✅ Package data configured correctly
• ✅ Config command updated to support package file lookup

Checklist

• MANIFEST.in created
• config.yaml.example added to package
• README.md added to package
• package-data configured in pyproject.toml
• Config.py updated with importlib.resources
• All tests pass
• Pre-commit checks pass
• Version bumped (8.0.4 → 8.0.5)
• Code committed
• Branch pushed

Note: Files are now included in the package directory and accessible via importlib.resources after installation.

Fixes #32

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 72.72727% with 3 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
email_processor/cli/commands/config.py	72.72%	3 Missing ⚠️

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