feat(wrapper/rdkit-read): add reading function for rdkit mol objects

[bbh-pharm]

Checklist

• Have you checked that there aren't other open pull requests for the same issue?
• Have you linked the issue(s) you are working on (if any)?

If the change is related to the source code, tests, or build environments, please also check the following:

• Does pytest -vs pass without any errors and warnings (at the project root)?
• Does mypy --pretty pass without any errors and warnings (at the project root)?

If you added new feature(s), then also check the following:

• Did you also add corresponding tests?

Linked Issues

Link the tracking issue(s) of this PR, with the auto-close keywords here:

• Closes #...

---

rdkit 읽는 함수도 필요해서 추가합니다.

---

Note

Medium Risk
Introduces new file-parsing logic for MOL2/PDB splitting and optional sanitization, which can subtly change molecule interpretation and error handling. Risk is moderated by extensive new roundtrip and multi-molecule tests.

Overview
Adds a new read_mols API to wrapper/rdkit.py to load RDKit Mol objects from .sdf, .mol2, and .pdb, including support for multi-molecule .mol2 and multi-model .pdb, optional post-read sanitization, and optional explicit-H removal.

Expands the test suite with new ligand fixtures (single- and multi-molecule files across SDF/MOL2/PDB) and roundtrip tests validating molecule counts, atom/bond counts, and writer behavior when converting between formats.

^{Written by Cursor Bugbot for commit 53239bc. This will update automatically on new commits. Configure here.}

[codecov]

Codecov Report

❌ Patch coverage is 85.24590% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.88%. Comparing base (31dd926) to head (53239bc).
⚠️ Report is 17 commits behind head on main.

Files with missing lines	Patch %	Lines
src/gmol/base/wrapper/rdkit.py	85.24%	2 Missing and 7 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #13      +/-   ##
==========================================
- Coverage   82.91%   82.88%   -0.03%     
==========================================
  Files          14       14              
  Lines        1580     1648      +68     
  Branches      206      226      +20     
==========================================
+ Hits         1310     1366      +56     
- Misses        217      221       +4     
- Partials       53       61       +8     

Files with missing lines	Coverage Δ
src/gmol/base/wrapper/rdkit.py	73.64% <85.24%> (+8.13%)	⬆️

... and 1 file with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[jnooree]

@bbh-pharm 확인부탁합니다~

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

^{Bugbot Autofix is OFF. To automatically fix reported issues with Cloud Agents, enable Autofix in the Cursor dashboard.}