Reorganize hooks into dedicated submodule

Fixes #93

tox_poetry_installer/hooks/tox_add_env_config.py

@@ -0,0 +1,43 @@
+"""Add required env configuration options to the tox INI file"""
+from typing import List
+
+from tox.config.sets import EnvConfigSet
+from tox.plugin import impl
+
+
+@impl
+def tox_add_env_config(env_conf: EnvConfigSet):
+    env_conf.add_config(
+        "poetry_dep_groups",
+        of_type=List[str],
+        default=[],
+        desc="List of Poetry dependency groups to install to the environment",
+    )
+
+    env_conf.add_config(
+        "install_project_deps",
+        of_type=bool,
+        default=True,
+        desc="Automatically install all Poetry primary dependencies to the environment",
+    )
+
+    env_conf.add_config(
+        "require_locked_deps",
+        of_type=bool,
+        default=False,
+        desc="Require all dependencies in the environment be installed using the Poetry lockfile",
+    )
+
+    env_conf.add_config(
+        "require_poetry",
+        of_type=bool,
+        default=False,
+        desc="Trigger a failure if Poetry is not available to Tox",
+    )
+
+    env_conf.add_config(
+        "locked_deps",
+        of_type=List[str],
+        default=[],
+        desc="List of locked dependencies to install to the environment using the Poetry lockfile",
+    )