fix: generate tsconfig/jsconfig correctly for library option (#9712)

Author: dummdidumm

Diff for: .changeset/strong-bikes-join.md

@@ -0,0 +1,5 @@
+---
+'create-svelte': patch
+---
+
+fix: generate tsconfig/jsconfig correctly for library option

Diff for: packages/create-svelte/bin.js

@@ -63,15 +63,14 @@ const options = await p.group(
 		types: () =>
 			p.select({
 				message: 'Add type checking with TypeScript?',
+				initialValue: /** @type {'checkjs' | 'typescript' | null} */ ('checkjs'),
 				options: [
 					{
 						label: 'Yes, using JavaScript with JSDoc comments',
-						// @ts-expect-error :shrug:
 						value: 'checkjs'
 					},
 					{
 						label: 'Yes, using TypeScript syntax',
-						// @ts-expect-error :shrug:
 						value: 'typescript'
 					},
 					{ label: 'No', value: null }

Diff for: packages/create-svelte/shared/+libskeleton+checkjs/jsconfig.json renamed to packages/create-svelte/shared/+skeletonlib+checkjs/jsconfig.json

@@ -3,11 +3,12 @@
 		"allowJs": true,
 		"checkJs": true,
 		"noEmit": true,
-		"noImplicitAny": true,
 		"target": "esnext",
 		"module": "esnext",
 		"moduleResolution": "node",
-		"allowSyntheticDefaultImports": true
+		"allowSyntheticDefaultImports": true,
+		"strict": true,
+		"skipLibCheck": true
 	},
 	"include": ["./scripts/**/*", "./index.js", "./bin.js", "./utils.js"]
 }

Diff for: packages/create-svelte/shared/+libskeleton+typescript/tsconfig.json renamed to packages/create-svelte/shared/+skeletonlib+typescript/tsconfig.json

@@ -7,7 +7,7 @@ export function mkdirp(dir) {
 	try {
 		fs.mkdirSync(dir, { recursive: true });
 	} catch (e) {
-		if (e.code === 'EEXIST') return;
+		if (/** @type {any} */ (e).code === 'EEXIST') return;
 		throw e;
 	}
 }