[DOCS] NMIND checklist - targets that are easy to achieve

[zhao-cy]

Domain Documentation:

• [x] #149
• [x] #150
• [x] #151
• [ ] (gold) Continuous integration badges in README for build status
• [ ] #127
  • [ ] Note: This is needed to tell how much testing coverage currently BABS has
• [ ] (gold) Maintenance status is documented (e.g., expected turnaround time on pull requests, whether project is maintained)

Domain Infrastructure:

• [x] #124
• [x] #147
• [x] (silver) No excessive files included (i.e., unused files / cache; e.g., .gitignore)

Domain Testing:

• [x] #128
• [ ] Testing coverage > ?