Add documentation

members/ranges/src/range.rs

members/scopes-rs/src/lib.rs

members/types-rs/src/lib.rs

members/types-rs/src/math.rs

members/types-rs/src/types.rs

src/binary/completer.rs

src/binary/designators.rs

src/binary/lexer.rs

src/binary/mod.rs

src/lib/assignments/actions.rs

src/lib/builtins/exists.rs

src/lib/builtins/is.rs

src/lib/builtins/test.rs

src/lib/expansion/braces.rs

src/lib/expansion/loops.rs

src/lib/expansion/methods/arrays.rs

src/lib/expansion/methods/mod.rs

src/lib/expansion/methods/strings.rs

src/lib/expansion/mod.rs

src/lib/expansion/pipelines.rs