style: align with `standard-GEM` template v0.5

[haowang-bioinfo]

Main improvements in this PR:

• This PR is to address the issue raised in #5, by adjusting standard-GEM.md file to reflect the repo status and align with the specifications defined by standard-GEM

I hereby confirm that I have:

• [ ] Tested my code on my own computer for running the model
• [X] Selected devel as a target branch