Extract InterpreterFrame from Frame with Deref wrapper by youknowone · Pull Request #7353 · RustPython/RustPython

Cell/free variable objects were stored in both a separate
`Box<[PyCellRef]>` (cells_frees field) and in the localsplus
fastlocals array. Remove the redundant cells_frees field and
access cell objects directly through localsplus, eliminating
one Box allocation and N clone operations per frame creation.

Introduce InterpreterFrame struct containing all execution state
fields previously on Frame. Frame now wraps InterpreterFrame via
FrameUnsafeCell and implements Deref for transparent field access.

localsplus and prev_line are plain fields on InterpreterFrame
(no longer individually wrapped in FrameUnsafeCell) since the
entire InterpreterFrame is wrapped at the Frame level.

* Remove cells_frees duplicate storage from Frame

Cell/free variable objects were stored in both a separate
`Box<[PyCellRef]>` (cells_frees field) and in the localsplus
fastlocals array. Remove the redundant cells_frees field and
access cell objects directly through localsplus, eliminating
one Box allocation and N clone operations per frame creation.

* Extract InterpreterFrame from Frame with Deref wrapper

Introduce InterpreterFrame struct containing all execution state
fields previously on Frame. Frame now wraps InterpreterFrame via
FrameUnsafeCell and implements Deref for transparent field access.

localsplus and prev_line are plain fields on InterpreterFrame
(no longer individually wrapped in FrameUnsafeCell) since the
entire InterpreterFrame is wrapped at the Frame level.

* Auto-format: cargo fmt --all

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