Refactor/hbs template logics extract to classes with implement interface

[jackey8616]

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I extracted the hbs template's logics into classes implements TemplateService interface. Its better for future implementation on other frameworks.

[jackey8616]

@WoH I need re-run failed job again. oops. I think we need to setup some try at actions.

[WoH]

LGTM, thanks!