[REQUIREMENT] Extract pattern data about compact number formats

[wangyi-e]

Is your feature request related to a problem? Please describe.
To support the compact representation of a number: like 987654321 => 988M

The reference link: https://www.unicode.org/reports/tr35/tr35-numbers.html#Compact_Number_Formats

eg: locale: 'en-GB'
formatOptions:{ notation: "compact" , compactDisplay: "short" })
input:(987654321));
output:( 988M

Describe the solution you'd like
The backend service can provide the corresponding pattern data regarding the 'decimalFormats-[numberSystem]'

For the first version, the number system is the value of 'defaultNumberingSystem' in raw pattern data:
https://github.com/unicode-cldr/cldr-numbers-full/blob/master/main/en/numbers.json

Describe alternatives you've considered
A clear and concise description of any alternative solution or feature you've considered.

Additional context
CLDR data: https://github.com/unicode-cldr/cldr-numbers-full/blob/master/main/en/numbers.json