Added support to set time zone offset

[codecov[bot]]

Codecov Report

Base: 94.97% // Head: 95.03% // Increases project coverage by +0.05% :tada:

Coverage data is based on head (208a89d) compared to base (692ddda). Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #241 +/- ## ========================================== + Coverage 94.97% 95.03% +0.05% ========================================== Files 24 24 Lines 2270 2274 +4 ========================================== + Hits 2156 2161 +5 + Misses 114 113 -1 ``` | [Impacted Files](https://codecov.io/gh/log2timeline/dfdatetime/pull/241?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=log2timeline) | Coverage Δ | | |---|---|---| | [dfdatetime/golang\_time.py](https://codecov.io/gh/log2timeline/dfdatetime/pull/241/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=log2timeline#diff-ZGZkYXRldGltZS9nb2xhbmdfdGltZS5weQ==) | `94.59% <100.00%> (ø)` | | | [dfdatetime/interface.py](https://codecov.io/gh/log2timeline/dfdatetime/pull/241/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=log2timeline#diff-ZGZkYXRldGltZS9pbnRlcmZhY2UucHk=) | `96.65% <100.00%> (+0.03%)` | :arrow_up: | | [dfdatetime/dotnet\_datetime.py](https://codecov.io/gh/log2timeline/dfdatetime/pull/241/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=log2timeline#diff-ZGZkYXRldGltZS9kb3RuZXRfZGF0ZXRpbWUucHk=) | `96.22% <0.00%> (+1.88%)` | :arrow_up: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=log2timeline). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=log2timeline)

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