fix: Add support for vite.config.ts

[bfanger]

When using a vite.config.ts (instead of a vite.config.js) TypeScript generates an error:

error TS2307: Cannot find module '@sveltejs/kit/vite' or its corresponding type declarations.

1 import { sveltekit } from "@sveltejs/kit/vite";
                            ~~~~~~~~~~~~~~~~~~~~

Found 1 error in vite.config.ts:1

Adding the vite.config.ts to the includes fixes this issue.

Also closes #5443

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[changeset-bot]

🦋 Changeset detected

Latest commit: 2655935

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

This PR includes changesets to release 1 package

Name	Type
@sveltejs/kit	Patch

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[Rich-Harris]

thanks!

[Layendan]

I am still getting this error, even in the new version.

I ran vite build as well as reloaded the window after updating; however, the error still appears.

Although I doubt that the missing module error is linked to this issue. They did appear in my repository at the same time.

Gihub Repo

Edit: File in question

System:
    OS: macOS 12.5.1
    CPU: (8) arm64 Apple M1
    Memory: 103.64 MB / 16.00 GB
    Shell: 5.8.1 - /bin/zsh
  Binaries:
    Node: 18.0.0 - /usr/local/bin/node
    Yarn: 1.22.19 - ~/.yarn/bin/yarn
    npm: 8.6.0 - /usr/local/bin/npm
  Browsers:
    Chrome: 104.0.5112.101
    Safari: 15.6.1
  npmPackages:
    @sveltejs/adapter-static: ^1.0.0-next.39 => 1.0.0-next.39 
    @sveltejs/kit: 1.0.0-next.429 => 1.0.0-next.429 
    svelte: ^3.49.0 => 3.49.0 
    vite: ^3.0.9 => 3.0.9

Update: I have changed my tsconfig.json from

{
  "compilerOptions": {
    "moduleResolution": "node",
    "module": "esnext",
    "lib": ["es2021", "DOM"],
    "target": "es2020",
    "importsNotUsedAsValues": "error",
    "preserveValueImports": true,
    "isolatedModules": true,
    "resolveJsonModule": true,
    "sourceMap": true,
    "esModuleInterop": true,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true,
    "baseUrl": ".",
    "allowJs": true,
    "checkJs": true,
    "paths": {
      "$lib": ["src/lib"],
      "$lib/*": ["src/lib/*"]
    }
  },
  "include": ["src/**/*.d.ts", "src/**/*.js", "src/**/*.ts", "src/**/*.svelte"],
  "extends": "./.svelte-kit/tsconfig.json"
}

to

{
	"extends": "./.svelte-kit/tsconfig.json",
	"compilerOptions": {
		"allowJs": true,
		"checkJs": true,
		"esModuleInterop": true,
		"forceConsistentCasingInFileNames": true,
		"resolveJsonModule": true,
		"skipLibCheck": true,
		"sourceMap": true,
		"strict": true
	}
	// Path aliases are handled by https://kit.svelte.dev/docs/configuration#alias
	//
	// If you want to overwrite includes/excludes, make sure to copy over the relevant includes/excludes
	// from the referenced tsconfig.json - TypeScript does not merge them in
}

And that seemed to fix it.