feat: enable custom cwd for vite plugin

[Anthony-Jhoiro]

Context

When using sveltekit in a mono-repository context, the build tends to fail with the following error message:

src/app.html does not exist

The error persists if you change the file location from the svelte config.

This is due to the file resolutions being made from the current directory instead of the project's root directory. While it works totally fine in a standalone project, it can't work in a monorepository context.

The objective of this pull request is to provide an option that specifies the root of the project in the vite adapter and to base the file resolution on the new option if it is provided while keeping the default process.cwd() directory if not provided

Related issues

• Sveltekit: New app errors nxext/nx-extensions#1058

Note that the code still needs a bit of refactoring, failing tests seems unrelated but I'll take a look this week

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Latest commit: ff5db2c

The changes in this PR will be included in the next version bump.

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@sveltejs/kit	Minor

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[benmccann]

Did you see there was already a PR sent for this a few days ago? #12410