docs: fix python version badge

docs: update badge link

docs: rename CI pipeline

ci: rename ci pipeline

ci: temporarily comment out feast validation

docs: add additional readme badges

docs: revise README for clarity and updates on MLflow

docs: add callout note

docs: add proper sections

feat: setup RDS postgres for mlflow backend store

fix: use correct ECR repo name

fix: use correct ECR url

chore: remove tfplan and unused readme file

feat: prepare mlflow and training job

docs: add task to test training pod