feat(cli): add JetBrains editor setup

[Develop-KIM]

Fixes #1987

Summary

• Add JetBrains to the editor setup options and accept intellij as an alias.
• Write .idea/externalDependencies.xml with the Oxc IntelliJ plugin as a required plugin.
• Merge existing JetBrains required plugin files without duplicating the Oxc plugin entry.

Verification

• pnpm exec tsc -p /private/tmp/vite-plus-editor-tsconfig.json
• pnpm exec oxfmt --config /private/tmp/oxfmt-single-semi.json --check packages/cli/src/utils/editor.ts packages/cli/src/utils/__tests__/editor.spec.ts
• git diff --check

pnpm -C packages/cli test src/utils/__tests__/editor.spec.ts could not start in this local checkout because building the required rolldown native binding needs cargo, which is not available in this environment.

Disclosure

This contribution was prepared with AI assistance and reviewed before submission.

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[chatgpt-codex-connector]

Unignore JetBrains config before relying on it

When vp create ... --editor jetbrains writes externalDependencies.xml under .idea, the generated monorepo template still ignores .idea (packages/cli/templates/monorepo/_gitignore:24), and the create flow only unignores VS Code configs (packages/cli/src/create/bin.ts:1105-1106 and 1273-1274). In that generated-project context the required plugin file is ignored, so a normal initial commit omits the JetBrains setup even though the CLI reported writing it; add a JetBrains-specific unignore step similar to the VS Code one.

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