Use Jinja macros in `autoapi.rst` file for customization

[Revathyvenugopal162]

Description:
Implement Jinja macros in the autoapi.rst file: https://github.com/ansys/ansys-sphinx-theme/tree/main/src/ansys_sphinx_theme/theme/ansys_sphinx_theme/_templates/autoapi to streamline and customize the content generation for API documentation. Using Jinja macros will help create reusable templates, reduce code duplication, and enhance maintainability of the .rst files.

Acceptance Criteria:

• [ ] Create Jinja macros for repetitive content blocks in the autoapi.rst file.
• [ ] Replace existing content with appropriate macros.
• [ ] Verify that the autoapi.rst renders correctly using the new macros.
• [ ] Ensure the documentation structure and formatting remain consistent.

Note

Before contributing and starting any work, please make sure you agree with the CLA and sign it in your PR.

[jorgepiloto]

We already have macros in those files. Are we missing any additional macros, @Revathyvenugopal162?