feat: export WatchPlugin

Author: sxzz

src/plugins.ts

@@ -2,3 +2,4 @@ export { ExternalPlugin } from './features/external.ts'
 export { ShebangPlugin } from './features/shebang.ts'
 export { ReportPlugin } from './features/report.ts'
 export { NodeProtocolPlugin } from './features/node-protocol.ts'
+export { WatchPlugin } from './features/watch.ts'