[Doc] Add type BOOLEAN when enter 'help create table' in mysql client (#6852)

some user do not know Doris support type boolean, they use TINYINT,
so i add type BOOLEAN when enter 'help create table' in mysql client.

currently, type BOOLEAN size is 1 byte, but the value of boolean column only in {0,1} ,
which waste some memory, and i want change it's implement to 1 bit in the future.

docs/en/sql-reference/sql-statements/Data Definition/CREATE TABLE.md

@@ -52,6 +52,8 @@ Syntax:
     col_name: Name of column
     col_type: Type of column
     ```
+        BOOLEAN(1 Byte)
+            Range: {0,1}
         TINYINT(1 Byte)
             Range: -2^7 + 1 ~ 2^7 - 1
         SMALLINT(2 Bytes)
@@ -338,13 +340,14 @@ Syntax:
     ```
     CREATE TABLE example_db.table_hash
     (
-    k1 TINYINT,
-    k2 DECIMAL(10, 2) DEFAULT "10.5",
+    k1 BOOLEAN,
+    k2 TINYINT,
+    k3 DECIMAL(10, 2) DEFAULT "10.5",
     v1 CHAR(10) REPLACE,
     v2 INT SUM
     )
     ENGINE=olap
-    AGGREGATE KEY(k1, k2)
+    AGGREGATE KEY(k1, k2, k3)
     COMMENT "my first doris table"
     DISTRIBUTED BY HASH(k1) BUCKETS 32;
     ```

docs/zh-CN/sql-reference/sql-statements/Data Definition/CREATE TABLE.md

@@ -54,6 +54,8 @@ under the License.
     col_type：列类型
 
     ```
+        BOOLEAN（1字节）
+            范围：{0,1}
         TINYINT（1字节）
             范围：-2^7 + 1 ~ 2^7 - 1
         SMALLINT（2字节）
@@ -370,13 +372,14 @@ under the License.
     ```
     CREATE TABLE example_db.table_hash
     (
-    k1 TINYINT,
-    k2 DECIMAL(10, 2) DEFAULT "10.5",
+    k1 BOOLEAN,
+    k2 TINYINT,
+    k3 DECIMAL(10, 2) DEFAULT "10.5",
     v1 CHAR(10) REPLACE,
     v2 INT SUM
     )
     ENGINE=olap
-    AGGREGATE KEY(k1, k2)
+    AGGREGATE KEY(k1, k2, k3)
     COMMENT "my first doris table"
     DISTRIBUTED BY HASH(k1) BUCKETS 32;
     ```