fix: add IDSInfo handling in IDSSpecifications class

[ogorhc]

Ref: issue #628

Description

This PR fixes an issue in the IDSSpecifications component where the info metadata from the IDS file was correctly parsed by the XML parser but was never stored in the class.
As a result, important information such as title, version, author, etc., was lost after loading the IDS file.

The fix ensures that the parsed info block is now saved in the IDSSpecifications class (via a new IDSInfo property), making it accessible for later usage and consistent with the IDS schema.

Additional context

• Verified that the info fields are now available in the instance after loading an IDS file.
• Added handling for optional fields (e.g. description, copyright, milestone).
• This change does not affect existing specifications parsing.

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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