feat(core): advance options/state handling and workflow execution integration

- extend OptionsManager to support multi-namespace option resolution and toggling
- integrate OptionsManager more deeply across Action, ChainedAction, and ActionGroup
- propagate shared runtime configuration through execution layers
- refine action composition model (sequential + parallel execution semantics)
- improve lifecycle consistency across BaseAction, Action, ChainedAction, and ActionGroup
- begin aligning execution flow with centralized context and options handling

wip: routing and root option parsing behavior still in progress

tests/test_actions/test_load_file_action.py

@@ -0,0 +1,100 @@
+import pytest
+from rich.text import Text
+
+from falyx.action import LoadFileAction
+from falyx.console import console as falyx_console
+
+
+@pytest.mark.asyncio
+async def test_load_json_file_action(tmp_path):
+    mock_data = '{"key": "value"}'
+    file = tmp_path / "test.json"
+    file.write_text(mock_data)
+    action = LoadFileAction(name="load-file", file_path=file, file_type="json")
+    result = await action()
+    assert result == {"key": "value"}
+
+
+@pytest.mark.asyncio
+async def test_load_yaml_file_action(tmp_path):
+    mock_data = "key: value"
+    file = tmp_path / "test.yaml"
+    file.write_text(mock_data)
+    action = LoadFileAction(name="load-file", file_path=file, file_type="yaml")
+    result = await action()
+    assert result == {"key": "value"}
+
+
+@pytest.mark.asyncio
+async def test_load_toml_file_action(tmp_path):
+    mock_data = 'key = "value"'
+    file = tmp_path / "test.toml"
+    file.write_text(mock_data)
+    action = LoadFileAction(name="load-file", file_path=file, file_type="toml")
+    result = await action()
+    assert result == {"key": "value"}
+
+
+@pytest.mark.asyncio
+async def test_load_csv_file_action(tmp_path):
+    mock_data = "key,value\nfoo,bar"
+    file = tmp_path / "test.csv"
+    file.write_text(mock_data)
+    action = LoadFileAction(name="load-file", file_path=file, file_type="csv")
+    result = await action()
+    print(result)
+    assert result == [["key", "value"], ["foo", "bar"]]
+
+
+@pytest.mark.asyncio
+async def test_load_tsv_file_action(tmp_path):
+    mock_data = "key\tvalue\nfoo\tbar"
+    file = tmp_path / "test.tsv"
+    file.write_text(mock_data)
+    action = LoadFileAction(name="load-file", file_path=file, file_type="tsv")
+    result = await action()
+    assert result == [["key", "value"], ["foo", "bar"]]
+
+
+@pytest.mark.asyncio
+async def test_load_file_action_invalid_path():
+    action = LoadFileAction(
+        name="load-file", file_path="non_existent_file.json", file_type="json"
+    )
+    with pytest.raises(FileNotFoundError):
+        await action()
+
+
+@pytest.mark.asyncio
+async def test_load_file_action_invalid_json(tmp_path):
+    invalid_json = '{"key": "value"'  # Missing closing brace
+    file = tmp_path / "invalid.json"
+    file.write_text(invalid_json)
+    action = LoadFileAction(name="load-file", file_path=file, file_type="json")
+    with pytest.raises(ValueError):
+        await action()
+
+
+@pytest.mark.asyncio
+async def test_load_file_action_unsupported_type(tmp_path):
+    file = tmp_path / "test.txt"
+    file.write_text("Just some text")
+    with pytest.raises(ValueError):
+        LoadFileAction(name="load-file", file_path=file, file_type="unsupported")
+
+
+@pytest.mark.asyncio
+async def test_preview_of_load_file_action(tmp_path):
+    mock_data = '{"key": "value"}'
+    file = tmp_path / "test.json"
+    file.write_text(mock_data)
+    action = LoadFileAction(name="load-file", file_path=file, file_type="json")
+    with falyx_console.capture() as capture:
+        await action.preview()
+    captured = Text.from_ansi(capture.get()).plain
+    assert "LoadFileAction" in captured
+    assert "test.json" in captured
+    assert "load-file" in captured
+    assert "JSON" in captured
+    assert "key" in captured
+    assert "value" in captured