Shared/Localizations: Add translatable Units formatting (#5063)

Resources/Locale/en-US/_units.ftl

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+## Standard SI prefixes
+units-si--y = y
+units-si--z = z
+units-si--a = a
+units-si--f = f
+units-si--p = p
+units-si--n = n
+units-si--u = µ
+units-si--m = m
+units-si = {""}
+units-si-k = k
+units-si-m = M
+units-si-g = G
+units-si-t = T
+units-si-p = P
+units-si-e = E
+units-si-z = Z
+units-si-y = Y
+
+### Long form
+units-si--y-long = yocto
+units-si--z-long = zepto
+units-si--a-long = atto
+units-si--f-long = femto
+units-si--p-long = pico
+units-si--n-long = nnano
+units-si--u-long = micro
+units-si--m-long = milli
+units-si-long = {""}
+units-si-k-long = kilo
+units-si-m-long = mega
+units-si-g-long = giga
+units-si-t-long = tera
+units-si-p-long = peta
+units-si-e-long = exa
+units-si-z-long = zetta
+units-si-y-long = yotta
+
+## Pascals (Pressure)
+units-u--pascal = µPa
+units-m--pascal = mPa
+units-pascal = Pa
+units-k-pascal = kPa
+units-m-pascal = MPa
+units-g-pascal = GPa
+
+units-u--pascal-long = Micropascal
+units-m--pascal-long = Millipascal
+units-pascal-long = Pascal
+units-k-pascal-long = Kilopascal
+units-m-pascal-long = Megapascal
+units-g-pascal-long = Gigapascal
+
+## Watts (Power)
+units-u--watt = µW
+units-m--watt = mW
+units-watt = W
+units-k-watt = kW
+units-m-watt = MW
+units-g-watt = GW
+
+units-u--watt-long = Microwatt
+units-m--watt-long = Milliwatt
+units-watt-long = Watt
+units-k-watt-long = Kilowatt
+units-m-watt-long = Megawatt
+units-g-watt-long = Gigawatt
+
+## Joule (Energy)
+units-u--joule = µJ
+units-m--joule = mJ
+units-joule = J
+units-k-joule = kJ
+units-m-joule = MJ
+
+units-u--joule-long = Microjoule
+units-m--joule-long = Millijoule
+units-joule-long = Joule
+units-k-joule-long = Kilojoule
+units-m-joule-long = Megajoule