Description

This changes the files in vite/types to all be lowercase, so that they can be referenced in typescript triple-slash directives, which for some reason seem to always lowercase the provided path.

Additional context

I think it's likely a bug in typescript, but I don't think we can hold our breath on a change upstream, and this doesn't seem like a horrible workaround.

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

Before submitting the PR, please make sure you do the following

• Read the Contributing Guidelines.
• Read the Pull Request Guidelines and follow the Commit Convention.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.

I couldn't find a good way to write tests for this, but I did build and copy the results into my node_modules of my project, and verified that it solves the issue I was having.