fix(create/migrate): wrap migrated Vite plugins with lazyPlugins (#1752)

## Summary

Fixes #1739 by preventing Vite plugin factories from being eagerly
executed during lint/format/check workflows.

This teaches create/migrate to wrap safe inline Vite plugin arrays with
`lazyPlugins`, so commands like `vp check --fix` and `vp staged` do not
hang when a plugin leaves open handles during config loading.

## Changes

- Add a conservative Rust transform for Vite configs:
- wraps direct inline `plugins: [...]` arrays as `lazyPlugins(() =>
[...])`
- uses `lazyPlugins(async () => [...])` when the array contains `await`
- skips CommonJS configs, dynamic plugin references, nested unsupported
shapes, and existing conflicting `lazyPlugins` bindings
- reuses or adds `lazyPlugins` imports from `vite-plus` without
duplicating imports
- Expose the transform through the CLI NAPI binding.
- Apply the rewrite in standalone and monorepo create/migrate paths.
- Surface the rewrite in migration reporting.
- Add regression coverage for standalone, monorepo, unsupported
expressions, `staged`, and import edge cases.

## Why

Issue #1739 showed this path:

```txt
vp staged
→ vp check --fix
→ vp lint
→ loads vite.config.ts
→ plugin factories execute eagerly
→ plugins like nitro can leave open handles
→ command hangs
```

Wrapping generated/migrated inline plugins with `lazyPlugins` keeps
plugin factories from running for `lint`, `fmt`, `check`, and `staged`,
while preserving normal plugin execution for `dev`, `build`, `test`, and
`preview`.

## Validation

- `cargo fmt --check`
- `cargo test -p vite_migration`
- `vp test packages/cli/src/migration/__tests__/migrator.spec.ts
packages/cli/src/__tests__/index.spec.ts`

Author: jong-kyung

crates/vite_migration/src/lib.rs

@@ -18,4 +18,6 @@ mod vite_config;
 pub use file_walker::{WalkResult, find_ts_files};
 pub use import_rewriter::{BatchRewriteResult, rewrite_imports_in_directory};
 pub use package::{rewrite_eslint, rewrite_prettier, rewrite_scripts};
-pub use vite_config::{MergeResult, has_config_key, merge_json_config, merge_tsdown_config};
+pub use vite_config::{
+    MergeResult, has_config_key, merge_json_config, merge_tsdown_config, wrap_lazy_plugins,
+};