example unicode does not fit into varchars

Attempt to insert unicode into varchar column. Why it doesn't (mostly)
work.
add .gitignore
show difference binding as SQL_CHAR and SQL_WCHAR
include portions of MS docs in case url changes
demo code to get column/table etc code pages
move codepage stuff to a different file
output the UTF-8 encoded data we insert into db

show data UTF-8 encoded we insert into db
better wording in explanation