chore: add missing exports and type-check validation

[rlmestre]

No description provided.

[Copilot]

Pull Request Overview

This PR adds missing exports and type-check validation to improve the project's type safety and API completeness. The changes consolidate type exports using wildcard syntax and add TypeScript type checking to the CI pipeline.

Key changes:

• Consolidates individual type exports into wildcard exports for cleaner syntax
• Adds comprehensive test object setup to reduce duplication in test files
• Implements type-checking validation in both package.json scripts and CI workflow

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/index.ts	Replaces individual type exports with wildcard exports for all types
src/eol/utils.test.ts	Adds shared default metadata object and uses spread operator in tests
src/cdx-xml-to-json.test.ts	Adds optional chaining and non-null assertions for type safety
package.json	Adds type-check script for TypeScript validation
.github/workflows/validate.yml	Adds CI job for type checking tests

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