feat: Support UUID type

[apstndb]

This PR implements UUID type decoding.

Before

$ go run github.com/cloudspannerecosystem/spanner-cli@v0.11.1 -v -e 'SELECT NEW_UUID(), [NEW_UUID()]'
+-----------------------------------------------------+-------------+
|                                                     |             |
| UUID                                                | ARRAY<UUID> |
+-----------------------------------------------------+-------------+
| string_value:"58458950-7d28-4c6a-b459-1e760f9c5ab0" | []          |
+-----------------------------------------------------+-------------+
1 rows in set (0.22 msecs)
timestamp:            2026-01-31T04:19:32.71673+09:00
cpu time:             0.19 msecs
rows scanned:         0 rows
deleted rows scanned: 0 rows
optimizer version:    8
optimizer statistics: auto_20260129_12_27_00UTC

After

$ go run ./ -v -e 'SELECT NEW_UUID(), [NEW_UUID()]'
+--------------------------------------+----------------------------------------+
|                                      |                                        |
| UUID                                 | ARRAY<UUID>                            |
+--------------------------------------+----------------------------------------+
| 01e56cf0-5e9c-4795-867a-42d5a5718730 | [872d2b7c-0d27-4769-b749-d2a8ffb86be4] |
+--------------------------------------+----------------------------------------+
1 rows in set (2.54 msecs)
timestamp:            2026-01-31T04:19:18.414251+09:00
cpu time:             1.92 msecs
rows scanned:         0 rows
deleted rows scanned: 0 rows
optimizer version:    8
optimizer statistics: auto_20260129_12_27_00UTC