chore: init imports var before use

[poyoho]

Description

Additional context

---

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

Before submitting the PR, please make sure you do the following

• Read the Contributing Guidelines.
• Read the Pull Request Guidelines and follow the Commit Convention.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.

[bluwy]

Not sure if we need this since the catch block below would throw an error before something else uses imports. Though we did do something like this in the code above 🤔

vite/packages/vite/src/node/plugins/importAnalysisBuild.ts

Lines 147 to 152 in 89dd31c

	let imports: readonly ImportSpecifier[] = []
	try {
	imports = parseImports(source)[0]
	} catch (e: any) {
	this.error(e, e.idx)
	}

[poyoho]

if no init the variable, vscode will throw an error.

[bluwy]

Yeah this seems to be similar to #9015. I'd actually be fine to merge this anyway with the same reason as that PR.