Bug - SyntaxWarning: "\." is an invalid escape sequence

I get the following warning when building `MkDocs` documentation using the `monorepo` plugin:

```sh
SyntaxWarning: "\." is an invalid escape sequence. Such sequences will not work in the future. Did you mean "\\."? A raw string is also an option.

File ".venv/lib/python3.14/site-packages/mkdocs_monorepo_plugin/plugin.py", line 19, in
from .parser import Parser
```

Details:
- Python version: 3.14.2
- monorepo version: 1.1.1
- MkDocs version: 1.6.1

Start with the installed plugin.py at line 19 and follow its import of parser.py; inspect the relevant source for the invalid escape sequence reported during the MkDocs build. Reproduce the warning with the documented Python 3.14.2, monorepo 1.1.1, and MkDocs 1.6.1 versions, then verify that the build completes without this SyntaxWarning.

Written by the indexing model from the issue text.