[i18n] future 2.x plan #9104

Features planned for 2.0:

• gender
• pluralization
• runtime compiler
• offline compiler
• xliff support
• hash message ids
• i18n messages

fix issues:

• xmb/xtb support [Feature][i18n] .xmb/.xtb support #9067
• do not extract empty msgs [i18n] do not extract message when there is not child nodes #8802
• allow escaping ICU messages - [i18n] escaping in ICU message #9286
• fix markup for plural/gender [i18n] {messages.length, plural, ...} should not be expanded to a list #9072 (PR feat(I18N Expander): do not add extra <ul> & <li> around ICU mess… #9283)
• improve the extractor [i18n]: add support for implicit translation #9071 (PR feat(I18nExtractor): Add file paths to error messages #9177)
• fix ICU format [i18n] ICU format for plural #9094 (fixed in 5267115)

fix post 2.0:

• Template Parser: Error when passing object literal as pipe parameter. False-Positive: Parser Error: Missing expected } at the end of the expression #9571
• Improve Html Parser Html Parser improvements #9340
• Opt out of translation I18n: Opting out of translation #7814
• Provide NgLocalization implementation per locale
• ICU plural format [i18n] ICU plural format - support # and offset #9117
• allow ICU messages in attributes
• implement ICU ordinal messages
• use translation strings outside of a template i18n: Able to use translation strings outside a template #11405