doc: document AliasedBuffers usage scope in style guide

Expose AliasedBuffer API and its function through the C++ style guide, and also differentiate it with TypedArrays.

Fixes: https://github.com/nodejs/node/issues/22977

A draft attempt to follow @joyeecheung 's thought, open to iterate over the verbiage.

/cc @joyeecheung @addaleax

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines