Improve doxygen documentation for ResourceLimitsQos [16814]

[richiware]

Description

This PR specifies the meaning of value 0 in ResourceLimitsQos attributes.

Contributor Checklist

• Commit messages follow the project guidelines.
• The code follows the style guidelines of this project.
• N/A Tests that thoroughly check the new feature have been added/Regression tests checking the bug and its fix have been added.
• Any new/modified methods have been properly documented using Doxygen.
• N/A Fast DDS test suite has been run locally.
• N/A Changes are ABI compatible.
• N/A Changes are API compatible.
• Documentation builds and tests pass locally.
• N/A New feature has been added to the versions.md file (if applicable).
• New feature has been documented/Current behavior is correctly described in the documentation.

• N/A Applicable backports have been included in the description.

Reviewer Checklist

• Check contributor checklist is correct.
• Check CI results: changes do not issue any warning.
• Check CI results: failing tests are unrelated with the changes.

[MiguelCompany]

@richiprosima Please test this