Download, Install, Shim and Updating

[Bios-Marcel]

So ... this PRs initial intent was to implement installation. However, installation is kind of similar to updating. In order to install anything, you have to download it first. And it order to actually make the installed stuff available, you need shimming ... and so on.

The new goal of this PR is to implement the complete install, update and uninstall workflow.

As soon as the PR is feature complete, I will merge it and start refactoring. Afterwards, improvement issues will be addressed.

It appears scoop isn't dead. They are currently adding improvements, also to shims. I should check the development branch once they merged everything and do what they did

TODO:

• [ ] Commands
  • [x] Download
  • [ ] Update
  • [ ] Shim (Add, remove, delete ...)
  • [ ] Uninstall
  • [x] Shims
  • [x] Persist Dirs
  • [x] EnvPath
  • [x] EnvSet
  • [x] Shortcuts
  • [ ] Run Uninstaller
  • [ ] PSModules
  • [ ] Variables in scripts
  • [ ] Install
  • [ ] Download / Cache
    • [x] Validate Hashes
    • [x] Cache Lookups
    • [ ] Extraction
    • [x] 7z
    • [x] zip
    • [x] innosetup
    • [ ] tar
    • [ ] UWP installers (dark)
    • [ ] msi
    • [ ] zst (archive format)
    • [ ] ...?
  • [x] Persist Dirs
  • [x] EnvPath
  • [x] EnvSet
  • [x] Shortcuts
  • [ ] Run Installer
  • [ ] PSModules
  • [ ] Shims
    • [x] Executables
    • [x] cmd/bat
    • [ ] bash
    • [ ] ps1
    • [x] jar
    • [ ] py
  • [ ] Print Suggestions
  • [ ] Print Notes
  • [ ] Install dependencies
  • [ ] Variables in scripts / paths