[Feature] Add form_13f Endpoint to equity.ownership (#6122)

* add form_13f endpoint

* review things

* option_type validator

* black

* codespell

* add some comments to the code

* remove duplicated process

* static file

* remove warning

* static why no one updates you :-(

---------

Co-authored-by: Pratyush Shukla <ps4534@nyu.edu>
Co-authored-by: Igor Radovanovic <74266147+IgorWounds@users.noreply.github.com>

openbb_platform/extensions/equity/integration/test_equity_python.py

@@ -1664,3 +1664,26 @@ def test_equity_fundamental_reported_financials(params, obb):
     assert result
     assert isinstance(result, OBBject)
     assert len(result.results) > 0
+
+
+@parametrize(
+    "params",
+    [
+        (
+            {
+                "symbol": "NVDA",
+                "date": None,
+                "limit": 1,
+                "provider": "sec",
+            }
+        ),
+    ],
+)
+@pytest.mark.integration
+def test_equity_ownership_form_13f(params, obb):
+    params = {p: v for p, v in params.items() if v}
+
+    result = obb.equity.ownership.form_13f(**params)
+    assert result
+    assert isinstance(result, OBBject)
+    assert len(result.results) > 0