feat: setup thymeleaf

• remove the frontend project from gradle
• remove the angular filter
• create a basic layout and home page using thymeleaf

changed target branch from master to epic/merge-faidare-dd

I have corrected the target branch from master to epic/merge-faidare-dd, it seems now this branch had already been included in the target branch.

@cyril.pommier I believe we can close this MR now, if you disagree, let reopen it.

closed