pdm: add "transformation_type" category on transformations

For the same purpose as "trade_condition_type" on trade conditions,
to organise the transformation in a way that makes sense to users.
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-TestRunner2

01:44:27

passed ERP5.UnitTest-TestRunner2

02:08:48

passed ERP5.CodingStyleTest-TestRunner2

01:32:52

passed ERP5.CodingStyleTest-TestRunner2

08:32:01

passed ERP5.CodingStyleTest-TestRunner2

00:59:26

passed ERP5.CodingStyleTest-TestRunner2

02:12:31

passed ERP5.CodingStyleTest-TestRunner2

02:17:53

passed ERP5.CodingStyleTest-TestRunner2

01:56:35

passed ERP5.CodingStyleTest-TestRunner2

01:36:41

passed ERP5.CodingStyleTest-TestRunner2

02:01:04

passed ERP5.UnitTest-TestRunner2

02:37:11

passed ERP5.UnitTest-TestRunner2

03:08:55

failed ERP5.UnitTest-TestRunner2

10:27:52

passed ERP5.UnitTest-TestRunner2

04:43:29

passed ERP5.UnitTest-TestRunner2

03:27:50

passed ERP5.UnitTest-TestRunner2

03:30:08

passed ERP5.UnitTest-TestRunner2

03:05:05

passed ERP5.UnitTest-TestRunner2

01:57:50