Support for React 18/19, React Router 6/7

[joncamp]

Is your feature request related to a problem? Please describe.
React 19 was just released in December 2024 per https://react.dev/versions, and React Router v7 was released in December as well. Based on the status of #13 and the version of this library being pegged to the React version, it seems like this library is now two major versions behind.

Describe the solution you'd like
Updated support for React 18 and React Router v6, and ideally v7 as well.

Describe alternatives you've considered
Not using this library, or application insights in general...which is sub-optimal.

Additional context
Ensuring support for other common React scenarios such as using Webpack and Electron would be ideal.

[MSNev]

@siyuniu-ms Can you please create a work item(s) to bump the major version(s) and to create branches for the older version.

[siyuniu-ms]

I've created the task in this current sprint.

[MSNev]

@joncamp Its it possibly for you to perform a quick test on whether the new nightly build (for v19) works for you
https://www.npmjs.com/package/@microsoft/applicationinsights-react-js/v/19.3.6-nightly.2503-08

Please suggest any updates that you think we should include.

[MSNev]

We have already release 18.3.6 and are moving towards 19.3.6 releasing

[sschoof]

@MSNev Since 19.3.6 is there, is the react 19 support complete?