Chore: Add RDKit and Matplotlib as explicit dependencies

## Changelogs - Explicitly mark `rdkit` and `matplotlib` as dependencies of Auroris. - Added `chore` as a category for the changelog. - Added `other` category for the changelog in case we forget to tag a PR. --- _Checklist:_ - [ ] ~_Was this PR discussed in an issue? It is recommended to first discuss a new feature into a GitHub issue before opening a PR._~ - [ ] ~_Add tests to cover the fixed bug(s) or the newly introduced feature(s) (if appropriate)._~ - [ ] ~_Update the API documentation if a new function is added, or an existing one is deleted._~ - [X] _Write concise and explanatory changelogs above._ - [X] _If possible, assign one of the following labels to the PR: `feature`, `fix` or `test` (or ask a maintainer to do it for you)._ --- Since we import directly [from RDKit](https://github.com/polaris-hub/auroris/blob/1db7572d8a4a34009c84d43f550466f6bfaa1bf8/auroris/curation/actions/_mol.py#L7) and [from Matplotlib](https://github.com/search?q=repo%3Apolaris-hub%2Fauroris%20matplotlib&type=code), we should include these as explicit dependencies.