Add initial models

[rnegron]

Added

• BaseModel (core app)
• Comment model (comments app)
• Meeting model (meetings app)
• Github CI attempt

Updated

• User model with profile fields
• Dockerfile to support pre-commit baked in
• Some configurations files and package installs (isort, Pipfile)

Closes #13

[rnegron]

Algo weird con mi git history 🤔 hace que este PR se vea más grande de lo que es, fixing...