- add encryption/decryption tests

- fixed "dzil install" issue, because it sets env PERL_MM_USE_DEFAULT and therefore breaks IO::Tiny::Prompt

t/02-init.t

 use v5.36;
 use Test::Cmd;
-use Test::More tests =>7;
+use Test::More tests =>10;
 use Path::Tiny;
 my $perl = $^X;
 my $testapp = Test::Cmd->new(
@@ -11,6 +11,8 @@ my $testapp = Test::Cmd->new(
     interpreter => "$perl -I lib/ ",
 );
 local $ENV{'HOME'} = $testapp->workpath();
+$ENV{'TEST_ACTIVE'}=1;
+delete $ENV{PERL_MM_USE_DEFAULT};
 my $config_dir = path($testapp->workpath())->child('.config');
 $config_dir->mkpath();
 my $config_file = $config_dir->child('ta-tool.rc');
@@ -18,6 +20,9 @@ my $cache_dir = path($testapp->workpath())->child('.cache');
 $cache_dir->mkpath();
 my $cache_file = $cache_dir->child('ta-tool.cache');
 # tests
+use_ok("SLUB::LZA::TA::Crypt");
+is(SLUB::LZA::TA::Crypt::encrypt("199fc76b9d086d8937976634e93413bcd005d941"), "839852bed005a7f1237578a6ac1197c142f7d0dd58bb248446dc7849d4bf770902e7f980ad83d39008ad638bc41e2345", "ta-tool, init, check encryption");
+is(SLUB::LZA::TA::Crypt::decrypt("839852bed005a7f1237578a6ac1197c142f7d0dd58bb248446dc7849d4bf770902e7f980ad83d39008ad638bc41e2345"), "199fc76b9d086d8937976634e93413bcd005d941", "ta-tool, init, check encryption");
 ok($testapp, "init 'ta-tool'");
 $testapp->run(
     stdin => <<_EOF_,