Viur-cli

- fix: renamed `viur script` to `viur tool`
- fix: renamed `viur scriptor` to `viur script`

- feat: added `viur install` subcommand to install scriptor and vi
- fix: `viur vi` command is deprecated use `viur install vi` instead
- feat: added `viur scriptor` command to use scriptor scripts
- fix: 2-to-3 script viur 3.3.4 updates
- fix: unified version schema
- feat: added `viur build release` command which build all flare and npm apps
- fix: removed `viur release` command
- feat: apps are now listed in a builds object in the project.json
- feat: 2 app kinds flare and npm are supported
- feat: added `viur project scanNpm` to add existing npm apps
- feat: added `viur script` call different viur related scripts like 2to3, flare or get_pyodide

- chore: updated app_server to 0.9.3
- chore: updated click to 8.1.3

- fix: broken `viur vi` command

- feat: download vi 4 with: `viur vi --next`

- fix: 2-to-3 correct some old boneNames
- docu: 2-to-3 documentation added to readme
- feat: 2-to-3 can be applied to a single file