Remove AppLoadContext

[brophdawg11]

Summary

• remove the obsolete AppLoadContext type export now that middleware always uses RouterContextProvider
• update framework/server templates, test stubs, and docs to reference RouterContextProvider/context APIs
• add a patch change file

Testing

• pnpm run typecheck

[github-actions]

Preview Build Available

Preview builds have been created for this PR. You can install react-router using:

pnpm install "remix-run/react-router#preview/pr-15207&path:packages/react-router"

And/or install other packages via:

pnpm install "remix-run/react-router#preview/pr-15207&path:packages/react-router-dev"
pnpm install "remix-run/react-router#preview/pr-15207&path:packages/react-router-express"
pnpm install "remix-run/react-router#preview/pr-15207&path:packages/react-router-node"
pnpm install "remix-run/react-router#preview/pr-15207&path:packages/react-router-serve"

These preview builds will be updated automatically as you push new commits.

[github-actions]

✅ Change File Found

A change file file exists in this PR. Thanks!

[github-actions]

The preview branch preview/pr-15207 has been deleted now that this PR is merged/closed.

[github-actions]

🤖 Hello there,

We recently published version 8.0.1 which includes this pull request. If you'd like to take it for a test run please try it out and let us know what you think!

Thanks!