Converts the repo file tree items into `<a>` elements to have default
link behavior. Dynamic content load is still done when no special key is
pressed while clicking on an item.
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Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
In the file tree, the icons are not vertically centered, which affects
the overall visual consistency.
Currently, the icons of submodules and symlinks do not adopt the value
of entryIcon, resulting in inconsistent icon display.
before:

after:

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Co-authored-by: silverwind <me@silverwind.io>
Resolve#29328
This pull request introduces a file tree on the left side when reviewing
files of a repository.
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Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>