Custom logger support release

[chaqchase]

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[Copilot]

Pull request overview

This PR releases version 0.4.0 of cronbake, introducing custom logger support that allows integration with any logging library (pino, winston, bunyan, logtape, etc.).

• Exports the Logger interface for custom logger implementation
• Enables global logger configuration via Baker.create() and per-job override via baker.add()
• Adds comprehensive documentation and a working example demonstrating the feature

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
package.json	Version bump from 0.3.2 to 0.4.0 for the feature release
lib/types.ts	Quote style consistency changes (single to double quotes) and removal of duplicate comment block
lib/index.ts	Exports Logger type for public API
index.ts	Exports Logger type at package entry point
examples/logging.ts	New example demonstrating custom logger with colored output, global and per-job configuration, and error handling
examples/README.md	Documentation for the new logging example
README.md	Comprehensive custom logger documentation with usage examples
CHANGELOG.md	Release notes for v0.4.0 documenting the new Logger feature

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