Compares strings a and b case-insensitively and returns whether they are equal.
pub fn eqlIgnoreCase(a: []const u8, b: []const u8) bool
pub fn eqlIgnoreCase(a: []const u8, b: []const u8) bool {
if (a.len != b.len) return false;
for (a, 0..) |a_c, i| {
if (toLower(a_c) != toLower(b[i])) return false;
}
return true;
}