a `arrow_typeof` like posgresql's `pg_typeof`

[waitingkuo]

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sometimes it's not that easy to know the output type. e.g.

❯ select now();
+----------------------------+
| now()                      |
+----------------------------+
| 2022-08-10 06:36:01.967605 |
+----------------------------+
1 row in set. Query took 0.000 seconds.

i thought that it's a Timestamp(Nanosecond, None) until

❯ select now() + 1;
Plan("'Timestamp(Nanosecond, Some(\"UTC\")) + Int64' can't be evaluated because there isn't a common type to coerce the types to")

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A arrow_typeof to output the type like this

❯ select arrow_typeof(now());
+---------------------------------------+
| arrowtypeof(now())                    |
+---------------------------------------+
| Timestamp(Nanosecond, Some("UTC")     |
+---------------------------------------+
1 row in set. Query took 0.000 seconds.

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