Create EventEmitters

[1Psalm]

Description

Closes #581
Closes #582
Closes #583
Closes #584

Brief description of changes.

Type of Change

• Bug fix (fix(scope): message)
• New feature (feat(scope): message)
• Documentation (docs(scope): message)
• Refactoring (refactor(scope): message)
• CI/CD (ci(scope): message)
• Other

PR Title Format

This PR follows Conventional Commits:

type(scope): description

Examples:

• feat(backend): add user authentication
• fix(api): resolve race condition in order processing
• docs: update API documentation

Testing

• Tests pass locally
• New tests added (if applicable)

Checklist

• PR title follows type(scope): message format
• Code follows project style guidelines
• Self-review completed

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