Change default quote style from double to single quotes

[Copilot]

Overview

Changes the default quote style preference from double quotes to single quotes when creating new adapters, while keeping the option to select double quotes available.

Motivation

Most existing ioBroker adapters use single quotes, and the @iobroker/eslint-config package defaults to single quotes as well. This change aligns the default behavior with the broader ioBroker ecosystem, making it easier for new users to create adapters that match existing conventions.

Changes

• Updated the default value for the quotes question from "double" to "single" in src/lib/core/questions.ts
• Updated the fallback value in templates/prettier.config.mjs.ts to ensure single quotes are used when answers.quotes is undefined
• Updated test baseline expectations to reflect the new default
• Regenerated baseline test files to match the new default behavior

Impact

• New users: Will now default to single quotes when creating adapters
• Existing users: No impact - can still select double quotes if preferred
• Migration: No impact - the migration logic still correctly detects quote style from existing code

Testing

• ✅ All 63 unit tests pass
• ✅ All 50 baseline integration tests pass
• ✅ Linting passes
• ✅ Build completes successfully
• ✅ Template generation and type-checking verified

Fixes the issue by implementing the requested change with minimal modifications to the codebase.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Change default to use single quotes</issue_title>
<issue_description>The default value for quotes should be changed to single quotes.
The selection should be kept available.

Most adapters / repositories use single quotes ciurrently. And eslint-config defaults to single quotes too.
So it makes sense (in my oppinion) to default to singel quotes for new users / new repositories while keeping the optin for usere who really wnat to use double quotes tos elect them.</issue_description>

Comments on the Issue (you are @copilot in this section)

Fixes #1189

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