chore: simplify runes option

[Rich-Harris]

Description

The current runes option feels very elaborate, and makes svelte.config.js unnecessarily intimidating. I don't think we need to care about making the path relative (if you're building your app inside node_modules, then a) you're an extreme edge case and b) all that will happen is runes becomes undefined, harmlessly) or making it lowercase (if someone has a NODE_MODULES folder then they will have far more severe self-inflicted wounds than this).

We can make it a simple one-liner instead

Checklist

• Update snapshots (if applicable)
• Add a changeset (if applicable)
• Allow maintainers to edit this PR
• I care about what I'm doing, no matter the tool I use (Notepad, Sublime, VSCode, AI...)

[changeset-bot]

🦋 Changeset detected

Latest commit: 0dd5c54

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

This PR includes changesets to release 1 package

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sv	Patch

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[Rich-Harris]

Gah — lint is failing because of Prettier, but if I run Prettier then the tests fail. Seems there are conflicting configs somewhere?

[GrygrFlzr]

Gah — lint is failing because of Prettier, but if I run Prettier then the tests fail. Seems there are conflicting configs somewhere?

After the prettier format, the failing test is just a snapshot whose difference is formatting:

Error: Snapshot `cli > should create a new project with name 'create-only' > file "svelte.config.js" does not match snapshot 1` mismatched

 - /packages/sv/src/cli/tests/cli.ts:116:5

- Expected
+ Received

@@ -2,11 +2,11 @@

  /** @type {import('@sveltejs/kit').Config} */
  const config = {
  	compilerOptions: {
  		// Force runes mode for the project, except for libraries. Can be removed in svelte 6.
- 		runes: ({ filename }) => filename.split(/[/\\]/).includes('node_modules') ? undefined : true
+ 		runes: ({ filename }) => (filename.split(/[/\\]/).includes('node_modules') ? undefined : true)
  	},
  	kit: {
  		// adapter-auto only supports some environments, see https://svelte.dev/docs/kit/adapter-auto for a list.
  		// If your environment is not supported, or you settled on a specific environment, switch out the adapter.
  		// See https://svelte.dev/docs/kit/adapters for more information about adapters.

Should just need a snapshot update after the prettier format run.

[pkg-pr-new]

Open in StackBlitz

npx https://pkg.pr.new/svelte-migrate@1039

npx https://pkg.pr.new/sv@1039

npx https://pkg.pr.new/@sveltejs/sv-utils@1039

commit: 0dd5c54

[svelte-docs-bot]

Preview: https://svelte-dev-git-preview-cli-1039-svelte.vercel.app/