Allow manipulating values other than JSON

[marcospassos]

Summary

The current implementation of the JSON pointer is limited to manipulating JSON values, even though the underlying logic can handle any data type.

This PR refactors the typings to accept any value as input while ensuring the retrieval operations remain type-safe and aligned with the input structure. As a result, when types are defined correctly, the retrieved values will be constrained to the types present in the source input.

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings

[github-actions]

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