[vim/vim] refactor(vim9): use 'start' open urls on win32 (PR #18985)

[Mao-Yining]

• Use :!start directly, discard the using of explorer.exe.
• Update the document in eval.txt.

Currently, on Windows, explorer.exe is used to open files, URLs, etc. However, this approach has several issues:

1. No error reporting: If an invalid input is provided, it simply opens an Explorer window at the homepage without indicating an error.
2. Bad process management: For unknown reasons, an explorer.exe process sometimes remains running in the background after opening a file.
3. Poor performance: On my machine, opening a file takes over one second, which is unusually slow.

Since I do not currently have WSL available, I do not change the behavior in WSL. Nevertheless, I believe explorer.exe can be removed entirely.

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You can view, comment on, or merge this pull request online at:

  https://github.com/vim/vim/pull/18985

Commit Summary

• d5e7de1 refactor(vim9): use 'start' open urls on win32

File Changes

(2 files)

• M runtime/autoload/dist/vim9.vim (15)
• M runtime/doc/eval.txt (2)

Patch Links:

• https://github.com/vim/vim/pull/18985.patch
• https://github.com/vim/vim/pull/18985.diff

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