Add exclude patterns support for sort-only mode

[dvrkni]

Summary

• Add --exclude CLI argument to skip files matching patterns (e.g., *.terraform.yaml)
• Support multiple exclude patterns for flexible file filtering
• Add exclude_patterns to Config struct for configuration file support
• Implement pattern matching using glob patterns and filename matching
• Update README with exclude pattern examples and usage
• Bump version to 0.1.8

Examples

# Exclude terraform files
yabe --sort-only --sort-config-path sort-config.yaml -p "**/*.yaml" --exclude "*.terraform.yaml"

# Multiple exclude patterns
yabe --sort-only --sort-config-path sort-config.yaml -p "**/*.yaml" --exclude "*.terraform.yaml" --exclude "*-template.yaml"

# Config file support
exclude_patterns:
  - "*.terraform.yaml"
  - "*-template.yaml"

Test plan

• Test single exclude pattern functionality
• Test multiple exclude patterns
• Test exclude patterns with recursive glob patterns
• Test exclude patterns with configuration file
• Test exclude patterns with in-place sorting
• Verify excluded files are logged appropriately

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