Fix currency formatting with MachineCurrencyFormat

[mskalnik]

The machineFormatCurrency method incorrectly assumed commas as group separators, causing issues with formats using dots or no decimals. Introduce MachineCurrencyFormat to ensure consistent parsing. Update tests to cover all formats and fix validation tests for isIntegerCreator. Build process now runs tests, so the build step was removed from yarn test.

[mskalnik]

During this update, validation tests for the isIntegerCreator function failed because the tests had not been updated to reflect earlier changes. To prevent such issues in the future I updated the build to include running tests as part of the build process. Consequently, since tests are now run before the build, the build step was removed from the yarn test command.