feat: add support for vertical writing mode

[KewenCode]

1. Add support for alternative glyphs in vertical text mode when the font supports the 'vert' attribute.
   • Base on document UAX#50.
   • Add two test for vertical text.

     Test	Chrome-Origin	Chome-Current
     symbol-text
     text-cjk

     • In 'text-cjk', after applying feature vhal to the character Ấ, the harfbuzz rendering differs from that of Chrome, resulting in reduced spacing.

     ---

   • Finish Font rendering with vertical text #890
     • The direction of the character 'っ' (TR) was incorrect, and it has now been corrected to meet the relevant requirements of UAX#50.

     ---

   • Two tests underwent changes due to improved functionality

     text\textPath\complex	text\writing-mode\tb-and-punctuation

   ---

2. Add font to support all CJK text.
   • Font SourceHanSansHWSC-Regular.subset.ttf to support tests.
   • Due to the presence of CJK text in the four tests, the fallback font has been changed to new font.

     Location	Diff	Location	Diff
     text\text\xml-lang=ja		text\writing-mode\tb-with-rotate
     text\writing-mode\mixed-languages-with-tb-and-underline		text\writing-mode\tb-with-rotate-and-underline

   ---

3. Add two OpenType features (vhal halt) to accommodate CJK text.

[RazrFalcon]

Wow! That's a serious change. I'm no Unicode/Text Layout expert, so I would assume it's better.
As long as it does not break existing test - we're fine.

Does it actually fixes #890 ?

Also, 16MB for SourceHanSansHWSC-Bold.otf‎ is too much. Getting it below 1MB would be nice.
Can you try subsetting it as mentioned here?

Also, can you post new test file results before and the patch? Just for the reference. I want to see how exactly thing have changed. Thanks!

[KewenCode]

Wow! That's a serious change. I'm no Unicode/Text Layout expert, so I would assume it's better. As long as it does not break existing test - we're fine.

Does it actually fixes #890 ?

Also, 16MB for SourceHanSansHWSC-Bold.otf‎ is too much. Getting it below 1MB would be nice. Can you try subsetting it as mentioned here?

Also, can you post new test file results before and the patch? Just for the reference. I want to see how exactly thing have changed. Thanks!

Sorry to keep you waiting. The setup of fonttools has puzzled me for quite a while。
And thank you for your suggestion. I have optimized the font file and added a comparison image.

[RazrFalcon]

Thanks! Looks good to me.