DOC-4234 added bitmap examples (redis#3124)

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

Author: andy-stark-redis

doctests/bitmap_tutorial_test.go

@@ -0,0 +1,92 @@
+// EXAMPLE: bitmap_tutorial
+// HIDE_START
+package example_commands_test
+
+import (
+"context"
+"fmt"
+
+"github.com/redis/go-redis/v9"
+)
+
+// HIDE_END
+
+func ExampleClient_ping() {
+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, "pings:2024-01-01-00:00")
+// REMOVE_END
+
+// STEP_START ping
+res1, err := rdb.SetBit(ctx, "pings:2024-01-01-00:00", 123, 1).Result()
+
+if err != nil {
+panic(err)
+}
+
+fmt.Println(res1) // >>> 0
+
+res2, err := rdb.GetBit(ctx, "pings:2024-01-01-00:00", 123).Result()
+
+if err != nil {
+panic(err)
+}
+
+fmt.Println(res2) // >>> 1
+
+res3, err := rdb.GetBit(ctx, "pings:2024-01-01-00:00", 456).Result()
+
+if err != nil {
+panic(err)
+}
+
+fmt.Println(res3) // >>> 0
+// STEP_END
+
+// Output:
+// 0
+// 1
+// 0
+}
+
+func ExampleClient_bitcount() {
+ctx := context.Background()
+
+rdb := redis.NewClient(&redis.Options{
+Addr: "localhost:6379",
+Password: "", // no password docs
+DB: 0, // use default DB
+})
+
+// REMOVE_START
+_, err := rdb.SetBit(ctx, "pings:2024-01-01-00:00", 123, 1).Result()
+
+if err != nil {
+panic(err)
+}
+// REMOVE_END
+
+// STEP_START bitcount
+res4, err := rdb.BitCount(ctx, "pings:2024-01-01-00:00",
+&redis.BitCount{
+Start: 0,
+End: 456,
+}).Result()
+
+if err != nil {
+panic(err)
+}
+
+fmt.Println(res4) // >>> 1
+// STEP_END
+
+// Output:
+// 1
+}