Add Dropshelf and Dropover

[xiaoheiwowo]

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Types of Changes

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• [x] New addition to list
• [ ] Fixing bug in existing item in list
• [ ] Removing item from list
• [ ] Changing structure (organization) of list

Proposed Changes

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移动一些文件到 Finder 其他目录或其他程序（比如 VS Code）, 依靠普通拖动需要调整好窗口，这些 app 可以解决这个痛点。

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• [x] I have read the CONTRIBUTING guide
• [x] I have explained why this PR is important
• [x] I have added necessary documentation (if appropriate)

Further Comments

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