Fea/anywidget periodic table

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 40.00000% with 57 lines in your changes are missing coverage. Please review.

Project coverage is 34.07%. Comparing base (2eb0593) to head (09837fb). Report is 11 commits behind head on main.

Files	Patch %	Lines
...ipyoptimade/subwidgets/_periodic_table/__init__.py	42.30%	45 Missing :warning:
...rc/ipyoptimade/subwidgets/_periodic_table/utils.py	26.66%	11 Missing :warning:
src/ipyoptimade/subwidgets/periodic_table.py	50.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #18 +/- ## ========================================== + Coverage 33.76% 34.07% +0.30% ========================================== Files 20 22 +2 Lines 2375 2474 +99 ========================================== + Hits 802 843 +41 - Misses 1573 1631 +58 ``` | [Flag](https://app.codecov.io/gh/aiidalab/ipyoptimade/pull/18/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aiidalab) | Coverage Δ | | |---|---|---| | [ipyoptimade-py-3.11](https://app.codecov.io/gh/aiidalab/ipyoptimade/pull/18/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aiidalab) | `34.07% <40.00%> (+0.30%)` | :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=aiidalab#carryforward-flags-in-the-pull-request-comment) to find out more.

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