Add comments on corresponding Rust methods and tweak some names

README.md

theories/typing/examples/inc_vec.v

theories/typing/lib/cell.v

theories/typing/lib/list.v

theories/typing/lib/maybe_uninit.v

theories/typing/lib/mutex/mutex.v

theories/typing/lib/mutex/mutexguard.v

theories/typing/lib/option.v

theories/typing/lib/panic.v

theories/typing/lib/slice/array_slice.v

theories/typing/lib/slice/iter.v

theories/typing/lib/slice/slice_basic.v

theories/typing/lib/slice/slice_split.v

theories/typing/lib/slice/uniq_slice.v

theories/typing/lib/smallvec/smallvec.v

theories/typing/lib/smallvec/smallvec_basic.v

theories/typing/lib/smallvec/smallvec_index.v

theories/typing/lib/smallvec/smallvec_pop.v

theories/typing/lib/smallvec/smallvec_push.v

theories/typing/lib/smallvec/smallvec_slice.v