dev(narugo): add gif extraction

[codecov[bot]]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (ec3d0f1) 58.40% compared to head (55948bb) 58.53%. Report is 2 commits behind head on main.

Files	Patch %	Lines
waifuc/utils/session.py	0.00%	2 Missing :warning:
waifuc/source/frames.py	95.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #37 +/- ## ========================================== + Coverage 58.40% 58.53% +0.13% ========================================== Files 47 48 +1 Lines 2440 2465 +25 ========================================== + Hits 1425 1443 +18 - Misses 1015 1022 +7 ``` | [Flag](https://app.codecov.io/gh/deepghs/waifuc/pull/37/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=deepghs) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/deepghs/waifuc/pull/37/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=deepghs) | `58.53% <88.88%> (+0.13%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=deepghs#carryforward-flags-in-the-pull-request-comment) to find out more.

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