2023 年 1 月与 Source Han Sans 相关的整体问题

I apologize if this post is very long, but I have several issues while preparing my own fork. The examples I gave may not be exhaustive because I was only checking JIS Level 1 Kanji and part of JIS Level 2 Kanji. ## Remapping of 归 (U+5E30) For 归 (U+5E30), I suggest that the JP form (that is uni5E30-JP) be mapped to all regions. While I like to remove the other glyph (that is actually uni5E30uE0101-JP) currently mapped to CN/TW/HK, I found out it cannot be removed because it is a necessary part of Adobe Japan1-6. <img width="336" alt="Screenshot 2023-01-10 at 19 09 15" src="https://user-images.githubusercontent.com/10541683/211536091-4c884719-9aa7-4d6b-9424-cdae4f15c643.png"> Here is a comparison of Mac typefaces with this character: <img width="484" alt="Screenshot 2023-01-10 at 19 53 57" src="https://user-images.githubusercontent.com/10541683/211545200-25db01f1-e98a-4963-b35f-68dd6a92fa26.png"> <img width="416" alt="Screenshot 2023-01-10 at 19 54 13" src="https://user-images.githubusercontent.com/10541683/211545212-50bf5ecf-ef11-4791-b696-32687934e4da.png"> You can see the first stroke in almost all SC fonts is a straight line and not curved. The exception is the TC fonts which the first stroke is curved inward, but there is no such glyph for that in Source Han Sans/Serif because they're off-scope for TW and HK use and so I suggest the TW/HK forms also follow the JP form. While the current CN form is supported by the Unicode charts (as of 14.0, not sure about 15.0 and later), I think for consistency sake, we just use the JP form. <img width="822" alt="Screenshot 2023-01-10 at 19 14 01" src="https://user-images.githubusercontent.com/10541683/211536941-7695afcc-5a92-4b4d-8a69-bf915e861dc0.png"> ## Unnecessary and similar glyphs Further adding on to what’s reported in #313 and #326: The usual components to look out for, as mentioned in these issues, are 羊, 豆, 登, 鼓 (the left part), 辛, 幸 and also 戶 and 子. JP is circled in blue and the CN is circled in red. ~I suggest that we adopt CN forms for all locales for better consistency. I am not going to go into detail as there are too many characters to list and this was reported many times before.~ **EDIT:** I retract this statement. <img width="735" alt="Screenshot 2023-01-10 at 23 10 31" src="https://user-images.githubusercontent.com/10541683/211588523-3ab397b1-3700-462f-8058-b4b3be5aac3c.png"> I have new components to share, however. Components such as 五 and 吾 might need to be unified to the JP form where the third stroke is 90 degree angled. Examples: 五, 伍, 吾, 悟, 梧, 語, 语 (because it should be consistent with the rest even if it's a simplified character) <img width="1025" alt="Screenshot 2023-01-10 at 19 18 12" src="https://user-images.githubusercontent.com/10541683/211537840-ca1eb474-94de-4af0-a652-04fe428786b0.png"> Interestingly, other than 语, the HK locale is all consistent here. The JP locale has some CN forms in it. Please standardize here. For components with 矛, I'm not sure which form …