Reasons for making this change

react-router is a widely used library/framework for making routing based react applications. this PR adds react-router v7 framework mode's gitignore folders

Links to documentation supporting these rule changes

• reactrouter.com
• .gitignore in default template

React router has added framework mode on v7 which is based on Vite.

React router documentation unfortunately does not mention both of these:

• .react-router folder houses autogenerated .ts files (per-route) for type checking
• React router puts build output into the build folder (as opposed to dist with vite)

I have added .react-router into the gitignore but I am unsure about including the build folder. Should I keep it like this, include it or remove it? Currently its commented out (so if anyone needs to, they can uncomment it)

Merge and Approval Steps

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