fix(number-fields): align Currency, Decimal, Integer and Percentage with Constellation

[tumms2021389]

Currency, Decimal, Integer and Percentage fields now format, parse and save values the same way as the Constellation DX components.

• Use the operator locale (PCore getLocale) and the configured ISO code directly, instead of the country-map lookup.
• Currency input: place the symbol before or after the number per locale, honor "Show ISO Code", and use the currency's own decimal places (e.g. JPY = 0). NOK now shows "NOK"/"kr" instead of "$".
• Percentage input: place the % sign per locale and support storePercentageAsDecimal (show 25 for 0.25, save 25 as 0.25).
• Integer input: replace type="number" with a masked input that uses locale grouping and 0 decimals.
• Decimal input: use locale separators and stop adding $/% to read-only inputs.
• Save a number (or '' when cleared) instead of a formatted string, e.g. -100 rather than "-$100.00". Only save when the value changed; re-validate a field that stays empty.
• Show a value of 0 instead of treating it as empty.
• Read-only display follows the "Format" setting (Integer, Decimal, Decimal-Auto, Percentage, Currency) plus currency display, negative number display, notation and decimal places shown, through a shared formatNumberFieldForDisplay helper.
• format-utils: switch the Currency formatter to Intl, fix type errors, and remove dead/duplicated code.
• Add lodash.get as a dependency.

Refs: EA-D16359