The value of "--interactive" is not restricted

[MercuryDemo]

There is no restriction on the value of the interactive model entered by the user, but when the codespell is running, it only supports four types of interactive models, 0, 1, 2 and 3.

When other values are entered, the way of interaction will be confused. Here are some examples：

% codespell code.c -i 0 -w 
code.c:16: buring ==> burying, burning, burin, during
FIXED: code.c
% codespell code.c -i 10 -w
    fd = opem("/tmp/a", O_RDONLY);
 Choose an option (blank for none):  0) open: 0
    // buring your cpu
 Choose an option (blank for none):  0) burying 1) burning 2) burin 3) during: 0
FIXED: code.c
% codespell code.c -i 20 -w
code.c:16: buring ==> burying, burning, burin, during
FIXED: code.c
% codespell code.c -i -1 -w
FIXED: code.c

-i 20 and -i 0 give the same result, -i 10 and -i 2 give the same result, and -i -1 gives a different result from all the others.