Upload files by drag and drop

[vitvakatu]

Pull Request Description

The first part of #8158. No progress indication for the user implemented.

Kapture.2023-11-02.at.16.56.12.mp4

Important Notes

A few notable changes:

• A fix for DataServer/writeBytes
• Using @noble/hashes instead of sha3 because the latter only works with node. I also tried using js-sha3, but it does not work well with Vite (see Sveltekit + Vite unable to import function emn178/js-sha3#36)
• Fixed initialization of the ID map for new nodes. Also, all new nodes are prepended by four spaces to have proper indentation inside the main function.
• Fixed random pattern name generation because the previous approach sometimes produces identifiers starting with a number.

Checklist

Please ensure that the following checklist has been satisfied before submitting the PR:

• The documentation has been updated, if necessary.
• Screenshots/screencasts have been attached, if there are any visual changes. For interactive or animated visual changes, a screencast is preferred.
• All code follows the
  Scala,
  Java,
  and
  Rust
  style guides. In case you are using a language not listed above, follow the Rust style guide.
• All code has been tested:
  • Unit tests have been written where possible.
  • If GUI codebase was changed, the GUI was tested when built using ./run ide build.