Return complete metadata structures when calling getMetadata

[adevicef]

getMetadata fuction returns complete metadata structures for Package, Dublin Core, LOM and LOM-ES. Removed page contents from response, leaving only metadata. Updated test expected file for getMetadata test, and api.md documentation.

[Copilot]

Pull Request Overview

The PR refactors getMetadata to return only comprehensive metadata structures for Package, Dublin Core, LOM, and LOM-ES, removing page content from the response and updating documentation accordingly.

• Restructures the Package schema into nested metadata fields and removes page collection.
• Simplifies other schemas (Dublin Core, LOM, LOM-ES) to return raw data arrays.
• Updates the API docs to reflect the metadata-only return value.

Reviewed Changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 1 comment.

File	Description
src/ElpParser.php	Overhauled getMetadata: removed page content, restructured Package metadata, and switched other schemas to raw data
docs/api.md	Updated the Returns section to indicate metadata-only response

Comments suppressed due to low confidence (2)

src/ElpParser.php:585

• [nitpick] The schema name 'Dublin core' uses inconsistent capitalization. Consider using 'Dublin Core' for consistency with common conventions.

                'schema' => 'Dublin core',

src/ElpParser.php:547

• Several new nested metadata fields (e.g., 'description', 'usage', 'project_properties', 'format', 'taxonomy', 'advanced_options') were introduced. Add or update unit tests to verify these fields appear correctly in getMetadata output.

                    'lang' => $data['_lang'] ?? '',

[Copilot]

The key 'backgroundImgTile' is accessed without the leading underscore, while related keys use '_backgroundImg'. If the source field is '_backgroundImgTile', update this index to avoid returning an empty string.

Suggested change

	'backgroundImgTile' => $data['backgroundImgTile'] ?? '',
	'backgroundImgTile' => $data['_backgroundImgTile'] ?? '',