Centralize tsconfig.json (#5539)

* Centralize tsconfig.json

* Add entry for tsconfig

* Fix package name

* Remove tsconfig export

* Add module ESNext

* Add no checkJs

* Add @tsconfig/strictest to dependencies

* Fix component

* Add plugin to component

* Refactor CSS Modules configuration

* Rename to tsconfig.json

* Install typescript-plugin-css-modules

* Simplify

* Add dummy fields

* Add files

* Exclude test files

* Platform neutrality

* Move @jest-environment to top

* Keep @jest-environment at the top

* Add CSS Modules features

Author: compulim

CHANGELOG.md

@@ -239,6 +239,7 @@ Notes: web developers are advised to use [`~` (tilde range)](https://github.com/
 - Removed `StarterPromptsCardAction` during `blueprint` ui state in PR [#5477](https://github.com/microsoft/BotFramework-WebChat/pull/5477), by [@jcheung824](https://github.com/jcheung824)
 - Removed `abort-controller-es5` package in `botframework-directlinespeech-sdk` package, in PR [#5530](https://github.com/microsoft/BotFramework-WebChat/pull/5530), by [@compulim](https://github.com/compulim)
 - Removed `request` and `request-progress` package in `cldr-data-downloader` package, in PR [#5530](https://github.com/microsoft/BotFramework-WebChat/pull/5530), by [@copilot](https://github.com/copilot) and [@compulim](https://github.com/compulim)
+- Added internal package `@msinternal/botframework-webchat-tsconfig` to centralize TypeScript configuration files, in PR [#5539](https://github.com/microsoft/BotFramework-WebChat/pull/5539), by [@compulim](https://github.com/compulim)
 
 ### Fixed