Proposal - Money formatting

We need to look at a better approach to formatting money within CiviCRM. It should properly handle currencies, decimal places, "1000" separater (ie 1,000.00 and 1.000,00).

Some approaches:

Money formatting functions: https://github.com/civicrm/civicrm-core/pull/12055
Allow higher precision decimals to be entered so tax can be calculated correctly: https://github.com/civicrm/civicrm-core/pull/10641
MoneyPHP?

cc @eileen This is a tracking issue so I can close down PRs.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information