refactor: rename getDevstarDomain -> devstarDomain

src/utils.ts

@@ -104,7 +104,7 @@ export async function getVsCodeCommitId(): Promise<string> {
   }
 }
 
-export function getDevstarDomain(): string | undefined {
+export function devstarDomain(): string | undefined {
   // 从用户配置中读取
   return vscode.workspace.getConfiguration('devstar').get('devstarDomain')
 }