feat(goctl/rpc): support external proto imports with cross-package ty… (#5472)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

tools/goctl/rpc/cli/zrpc.go

@@ -105,6 +105,7 @@ func ZRPC(_ *cobra.Command, args []string) error {
 	ctx.IsGenClient = VarBoolClient
 	ctx.Module = VarStringModule
 	ctx.NameFromFilename = VarBoolNameFromFilename
+	ctx.ProtoPaths = VarStringSliceProtoPath
 	g := generator.NewGenerator(style, verbose)
 	return g.Generate(&ctx)
 }