Move dependencies key out of [project.urls] into [project]

PyYAML>=6 was declared under [project.urls], where PEP 621 requires
string values. Hatchling 1.32 rejects it, so metadata generation fails
for pip install ., pip install -e ".[dev]", and python -m build.
Moving it to [project] fixes the build and registers PyYAML as the
runtime dependency it is (llmism/_patterns.py imports yaml at import).

Fixes #1

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Author: frankreyesgarcia

pyproject.toml

@@ -12,11 +12,11 @@ license-files = ["LICENSE"]
 authors = [{ name = "Martin Monperrus", email = "martin.monperrus@gnieh.org" }]
 requires-python = ">=3.10"
 keywords = ["llm", "writing", "style", "detector", "prose"]
+dependencies = ["PyYAML>=6"]
 
 [project.urls]
 Homepage = "https://github.com/ASSERT-KTH/llmism"
 Issues = "https://github.com/ASSERT-KTH/llmism/issues"
-dependencies = ["PyYAML>=6"]
 
 [project.optional-dependencies]
 dev = ["pytest", "pytest-cov", "mypy", "ruff", "types-PyYAML"]