Fix custom template loading

[imjuni]

• fix custom template loading: apply template engine changing
• enhance configuration command
  • add more question: apply new cli option on question
• html table display changing
  • display nullable, charset, comment changed

[codecov[bot]]

Codecov Report

Patch and project coverage have no change.

Comparison is base (0b637c9) 100.00% compared to head (ba442c9) 100.00%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #27 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 42 42 Lines 432 432 Branches 65 65 ========================================= Hits 432 432 ```

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