feat: add hstrlen command for hash

Signed-off-by: rfyiamcool <[email protected]>

Author: rfyiamcool

commands_test.go

@@ -2423,7 +2423,7 @@ var _ = Describe("Commands", func() {
 			Expect(hStrLen.Err()).NotTo(HaveOccurred())
 			Expect(hStrLen.Val()).To(Equal(int64(len("hello"))))
 
-			nonHStrLen := client.HGet(ctx, "hash", "keyNon")
+			nonHStrLen := client.HStrLen(ctx, "hash", "keyNon")
 			Expect(hStrLen.Err()).NotTo(HaveOccurred())
 			Expect(nonHStrLen.Val()).To(Equal(int64(0)))