fix bug that book file whose name contains カタカナ can't be loaded

[sensuikan1973]

No description provided.

[codecov-commenter]

Codecov Report

Merging #330 (efcc837) into main (e79911c) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #330      +/-   ##
==========================================
- Coverage   96.16%   96.16%   -0.01%     
==========================================
  Files          15       15              
  Lines         626      678      +52     
==========================================
+ Hits          602      652      +50     
- Misses         24       26       +2     

Flag	Coverage Δ
macos-latest	96.16% <100.00%> (+0.31%)	⬆️
ubuntu-latest	96.01% <100.00%> (+0.33%)	⬆️
unit_test	96.16% <100.00%> (-0.01%)	⬇️
windows-latest	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
test/edax_command_test.dart	99.71% <100.00%> (+0.04%)	⬆️
lib/src/ffi/dylib_utils.dart	75.00% <0.00%> (-12.50%)	⬇️
lib/src/libedax.dart	95.48% <0.00%> (-0.65%)	⬇️

[sensuikan1973]

0010003 stdout doesn't contain "Loading book from ./resources/テスト_book.dat", but b8e491f contains "Loading book from ./resources/test_book.dat...done".

Then, fopen caused error, maybe.

https://learn.microsoft.com/ja-jp/cpp/c-runtime-library/reference/fopen-wfopen?view=msvc-170

[sensuikan1973]

https://stackoverflow.com/questions/2729792/how-to-open-a-file-with-unicode-filename-on-windows

[sensuikan1973]

https://pub.dev/documentation/path/latest/path/canonicalize.html

[sensuikan1973]

https://discourse.choreonoid.org/t/topic/382/5

[sensuikan1973]

https://stackoverflow.com/questions/53240475/non-ascii-filename-for-fopen

[sensuikan1973]

https://stackoverflow.com/questions/53240475/non-ascii-filename-for-fopen

[sensuikan1973]

hum....

do workaround like sensuikan1973/pedax#1339