Move view model code to shared components package (#31024)

* Remove vm related code from element-web/src

* Add and export view model code from package

* Update imports

* Rewrite vm tests using vitest

* Add github action to run vm tests

* Fix lint errors

* Mvoe tests over to jest

* Try fixing code coverage

* Second attempt at fixing code coverage

jest.config.ts

@@ -46,6 +46,7 @@ const config: Config = {
     ],
     collectCoverageFrom: [
         "<rootDir>/src/**/*.{js,ts,tsx}",
+        "<rootDir>/packages/**/*.{js,ts,tsx}",
         // getSessionLock is piped into a different JS context via stringification, and the coverage functionality is
         // not available in that contest. So, turn off coverage instrumentation for it.
         "!<rootDir>/src/utils/SessionLock.ts",