refactor(obicompactvec): unify bit and int vector slice views

Refactors column and matrix access to use unified `BitSliceView` and `IntSliceView` abstractions, replacing legacy `PackedCol`/`IntColView` types. Introduces `BitSlice`/`IntSlice` traits for zero-copy, trait-based bitwise and arithmetic operations across persistent and temporary vector types. Removes deprecated in-memory `MemoryBitVec` and `MemoryIntVec` implementations and their tests, while updating dependent crates to use the new view-based API and `BitSliceMut` trait.

src/obikpartitionner/src/common.rs

@@ -3,7 +3,6 @@ use std::io;
 use std::path::{Path, PathBuf};
 
 use obicompactvec::{PersistentBitVecBuilder, PersistentCompactIntVecBuilder};
-use obicompactvec::traits::BitSliceMut;
 use obilayeredmap::meta::PartitionMeta;
 use obilayeredmap::{IndexMode, OLMError};
 use obiskio::{SKError, SKResult};

src/obikpartitionner/src/select_layer.rs

@@ -6,7 +6,6 @@ use obicompactvec::{
     PersistentBitMatrix, PersistentBitMatrixBuilder, PersistentBitVecBuilder,
     PersistentCompactIntMatrix, PersistentCompactIntMatrixBuilder, PersistentCompactIntVecBuilder,
 };
-use obicompactvec::traits::BitSliceMut;
 use obilayeredmap::meta::PartitionMeta;
 use obilayeredmap::OLMError;
 use obiskio::{SKError, SKResult};