one_hot_encoder: TSQL vs. boolean type

[dataders]

changes

in support of making this macro compatible with TSQL, I:

• moved the logic that generates the included columns into the core macro which means:
  • the default__ and adapter__ macros don't require include_columns and exclude_columns, only col_list
• implemented sqlserver__one_hot_encoder in which:
  • true false and boolean is replaced with 1, 0, and bit

Related PRs and issues

#6, #7, #8

[jamesweakley]

nice refactor, thanks for that