i18n engine typescript migration (#22441)
* configure typescript build, add necessary dependencies, change extensions, react migration
* migrate lib files in root
* update tests snapshots, resolve core loader, helper
* fix types for core components
* fix angular components
* fix angular staff
* use Messages type
* first-upper-case letter while using classs
* use stable latest babel, fix ts issues
* optimize .babelrc
* update lock file
* Fix x-pack/yarn.lock
* fix issue with unknown babel plugin
* add babel-config.js file with babel configuration for i18n engine build process instead of .babelrc file to fix jest issue
* Resolve comments
* Fix babel config
* Fix packages incompatibility issue
* Fix tslint errors
* Fix tests
* Resolve comments
* Fix types
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