feat: Add the "in" operator

[vircoys]

#35

[guance-review-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: vircoys

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [vircoys]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[netlify]

✅ Deploy Preview for phenomenal-palmier-a1e093 ready!

Name	Link
🔨 Latest commit	5d7745f
🔍 Latest deploy log	https://app.netlify.com/sites/phenomenal-palmier-a1e093/deploys/64980acc71e8b900089217c9
😎 Deploy Preview	https://deploy-preview-36--phenomenal-palmier-a1e093.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site settings.

[guance-review-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: vircoys

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [vircoys]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[codecov]

Codecov Report

Merging #36 (5d7745f) into main (3a82402) will increase coverage by 0.49%.
The diff coverage is 79.14%.

@@            Coverage Diff             @@
##             main      #36      +/-   ##
==========================================
+ Coverage   56.64%   57.13%   +0.49%     
==========================================
  Files          46       46              
  Lines        4507     4568      +61     
==========================================
+ Hits         2553     2610      +57     
+ Misses       1671     1662       -9     
- Partials      283      296      +13