Release 1.0.16

• Merge branch 'main' of https://github.com/windingwind/zotero-pdf-translate (cf74c6b)
• Merge pull request #420 from zfb132:main (d050ee3)
• refactor: move splitChar input element to Advanced (010306c)
• add feat: support custom split char for translation (9a17b6b)
• add feat: support custom gpt api url (554812f)