Read the [project.optional-dependencies] and [dependency-groups] tables (#66)

I'd quite like to use `ruff-action`'s auto-detection feature, but it
currently doesn't read the `[project.optional-dependency]` table, and
support for the PEP 735 `[dependency-groups]` table is currently limited
to only the special-cased `dev` key, and does not account for the
possibility of `{include-group="..."}` inline tables, as [described by
the PEP](https://peps.python.org/pep-0735/#dependency-group-include).

I have guessed how to make the tests work, as the only JS development I
do is plain JS (sans frameworks), so TypeScript is still quite new to me
-- feel free to push required changes to this branch.

A

__tests__/fixtures/pyproject-dependency-groups-project/pyproject.toml

@@ -0,0 +1,22 @@
+[project]
+name = "pyproject-dependency-groups-project"
+version = "0.1.0"
+description = "Add your description here"
+readme = "README.md"
+requires-python = ">=3.12"
+
+[dependency-groups]
+dev = [
+    { include-group = "docs" },
+    { include-group = "lint" },
+]
+docs = [
+    "sphinx",
+]
+lint = [
+    "ruff==0.8.3",
+]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"

__tests__/fixtures/pyproject-dependency-groups-project/src/pyproject_dependency_dev_project/__init__.py

@@ -0,0 +1,2 @@
+def hello() -> str:
+    return "Hello from python-project!"

__tests__/fixtures/pyproject-dependency-groups-project/src/pyproject_dependency_dev_project/hello_world.py

@@ -0,0 +1 @@
+print("Hello world!")

__tests__/fixtures/pyproject-optional-dependencies-project/pyproject.toml

@@ -0,0 +1,15 @@
+[project]
+name = "pyproject-optional-dependencies-project"
+version = "0.1.0"
+description = "Add your description here"
+readme = "README.md"
+requires-python = ">=3.12"
+
+[project.optional-dependencies]
+lint = [
+    "ruff==0.8.3",
+]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"

__tests__/fixtures/pyproject-optional-dependencies-project/src/pyproject_dependency_dev_project/__init__.py

@@ -0,0 +1,2 @@
+def hello() -> str:
+    return "Hello from python-project!"

__tests__/fixtures/pyproject-optional-dependencies-project/src/pyproject_dependency_dev_project/hello_world.py

@@ -0,0 +1 @@
+print("Hello world!")