fix: Making query/2 actually use query. query/3 alias prepared statement

[mpope9]

This is a WIP fix for #33

One issue that I see that I am not sure how to fix (or what is causing it?). Many tests are failing with:

iex(1)> {:ok, db} = Duckdbex.open()
{:ok, #Reference<0.3897877700.3279814681.175777>}
iex(2)> {:ok, conn} = Duckdbex.connection(db)
{:ok, #Reference<0.3897877700.3279814681.175785>}
iex(3)> {:ok, result} = Duckdbex.query(conn, "CREATE TABLE table1(col1 TIMESTAMP);")
** (MatchError) no match of right hand side value: {:error, "Parser Error: syntax error at or near \"xir_ۉU\"\nLINE 1: CREATE TABLE table1(col1 TIMESTAMP);xir_ۉU\n                                            ^"}
    (stdlib 6.0.1) erl_eval.erl:652: :erl_eval.expr/6
    iex:3: (file)

Also interestingly only a single resultset is returned for the MSR, so maybe this is not completely finished