Match in visual use head not anchor

[pickfire]

Currently match is finding the match based on the anchor rather than the
head (cursor) so this behavior is rather unexpected when user is doing
a match but a different item was matched instead when the selection is
more than one character.

Example

#(let hello = {|)#
};

When mm

Before (it will match more than just the cursor matching char)

#(let hello = {
};|)#

After (it finds matching character based on the cursor)

#(let hello = {
}|)#;

There is one change I would like to do here but did not since it brings in more change, which is that mm will select everything within by default, rather than needing to do v. Maybe need to confirm with @sudormrfbin for that.