DOC-4235 added bitfield examples (#3125)

Co-authored-by: Vladyslav Vildanov <117659936+vladvildanov@users.noreply.github.com>
Co-authored-by: ofekshenawa <104765379+ofekshenawa@users.noreply.github.com>

doctests/bitfield_tutorial_test.go

@@ -0,0 +1,79 @@
+// EXAMPLE: bitfield_tutorial
+// HIDE_START
+package example_commands_test
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/redis/go-redis/v9"
+)
+
+// HIDE_END
+
+func ExampleClient_bf() {
+	ctx := context.Background()
+
+	rdb := redis.NewClient(&redis.Options{
+		Addr:     "localhost:6379",
+		Password: "", // no password docs
+		DB:       0,  // use default DB
+	})
+
+	// REMOVE_START
+	rdb.Del(ctx, "bike:1:stats")
+	// REMOVE_END
+
+	// STEP_START bf
+	res1, err := rdb.BitField(ctx, "bike:1:stats",
+		"set", "u32", "#0", "1000",
+	).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res1) // >>> [0]
+
+	res2, err := rdb.BitField(ctx,
+		"bike:1:stats",
+		"incrby", "u32", "#0", "-50",
+		"incrby", "u32", "#1", "1",
+	).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res2) // >>> [950 1]
+
+	res3, err := rdb.BitField(ctx,
+		"bike:1:stats",
+		"incrby", "u32", "#0", "500",
+		"incrby", "u32", "#1", "1",
+	).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res3) // >>> [1450 2]
+
+	res4, err := rdb.BitField(ctx, "bike:1:stats",
+		"get", "u32", "#0",
+		"get", "u32", "#1",
+	).Result()
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(res4) // >>> [1450 2]
+	// STEP_END
+
+	// Output:
+	// [0]
+	// [950 1]
+	// [1450 2]
+	// [1450 2]
+}