fix MultiIndex.difference not working with PyArrow timestamps (#61382) ,and some ruff formating fix

[NEREUScode]

Problem

The MultiIndex.difference method fails to remove entries when the index contains PyArrow-backed timestamps (timestamp[ns][pyarrow]). This occurs because direct tuple comparisons with PyArrow scalar types are unreliable during membership checks, causing entries to remain unexpectedly.

Example:

# PyArrow timestamp index
df = DataFrame(...).astype({"date": "timestamp[ns][pyarrow]"}).set_index(["id", "date"])
idx_val = df.index[0]
new_index = df.index.difference([idx_val])  # Fails to remove idx_val

Solution
Code Conversion: Map other values to integer codes compatible with the original index's levels.

Engine Validation: Use the MultiIndex's internal engine for membership checks, ensuring accurate handling of PyArrow types.

Mask-Based Exclusion: Create a boolean mask to filter out matched entries, then reconstruct the index.

Testing
Added a test in pandas/tests/indexes/multi/test_setops.py that:

Creates a MultiIndex with PyArrow timestamps.

Validates difference correctly removes entries.

Skips the test if PyArrow is not installed.

Use Case Impact
Fixes scenarios where users filter hierarchical datasets with PyArrow timestamps, such as:

# Remove specific timestamps from a time-series index
clean_index = raw_index.difference(unwanted_timestamps)

Closes #61382.

[NEREUScode]

i can't understand the error with my test code can someone review it and tell me