fix(create): skip monorepo editor configs by default

[jong-kyung]

Summary

Fixes #866.

vp create no longer auto-prompts for editor configuration or writes package-local editor settings when creating a project inside an existing monorepo. Monorepo packages now stay editor-agnostic by default, while explicit --editor remains an opt-in for users who intentionally want package-local settings.

Changes

• Skips automatic editor detection/selection when vp create runs inside an existing monorepo without --editor.
• Keeps --editor <name> as an explicit opt-in, including inside monorepos.
• Keeps --no-editor as an explicit opt-out.
• Normalizes repeated or mixed editor flags so values like --editor vscode --editor zed or --no-editor --editor vscode do not leak unexpected array values into create flow logic.
• Preserves existing behavior for standalone project creation and newly created monorepo roots.

[netlify]

✅ Deploy Preview for viteplus-preview canceled.

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[jong-kyung]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. 🎉

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