Revise project metadata to align with PyAnsys standards

[germa89]

• [ ] update authors file https://github.com/ansys/pymapdl/pull/3151
• [ ] update code owners file https://github.com/ansys/pymapdl/pull/3151
• [ ] Update tox file for different environments
• [ ] update Contributors.md file https://github.com/ansys/pymapdl/pull/3151
• [ ] Reformat api reference
• [ ] combine all the docker compose files

[Revathyvenugopal162]

• revisit minimum requirements file
• Update tox file for different env
• Contributors.md file
• Reformat api reference