Add PathField class for storing pathlib objects

Add tests for pathfield class
Add database fixture for generating test databases

tests/fixtures.py

@@ -0,0 +1,22 @@
+import uuid
+
+import peewee
+import pytest
+
+
+@pytest.fixture(scope="function")
+def fakedb(tmp_path):
+    """Create a temporary pho-database (fakedb) for testing fields"""
+
+    sqlite = peewee.SqliteDatabase(
+        tmp_path / f"{uuid.uuid4()}.db",
+        pragmas={
+            "journal_mode": "wal",
+            "cache_size": -1 * 64000,
+            "foreign_keys": 1,
+            "ignore_check_constraints": 0,
+            "synchronous": 0,
+        },
+    )
+
+    yield sqlite