Good idea!
Drag and drop box for file loader
See the last post in this thread: https://anvil.works/forum/t/file-upload-w-drag-drop/1883/8 (@shaun)
Copy to clipboard
I used @mattstibbs code in this thread: https://anvil.works/forum/t/copy-to-clipboard-button/1817/9
Markdown
There are several options:
https://anvil.works/forum/t/seeking-a-rich-text-display/64/13 (@shaun, @david.wylie)
https://anvil.works/forum/t/example-of-multiple-quill-js-editors/3700 (@mcmasty)
https://anvil.works/forum/t/allow-user-to-simple-format-textarea-bold-italic-list-link/4174 (@joinlook)
but I - first - ended up writing some documentation in goodle doc, using an extension to covert it to HTML/Markdown and insert it in a Custom HTML form. However, even this was quite clunky and in the end I just made a new form with labels and TextArea components for the About & Documentation section. Maybe a richer standard text component that allows markdown could be useful?
Feel free to add useful components. We could make a long list!