## Description
1. Move everything related to client from app folder to client folder
(`.yarn`, `yarn.lock`, package.json, .gitignore)
2. Move `ast` and `rst` to client packages
3. Fix running scripts in packages
4. Add running unit tests in packages in CI
TODO: It is necessary to consider enabling the `nmHoistingLimits:
workspaces` option, since now all packages are hoisted to the root,
there may be issues with dependencies in workspaces. Also, there is a
possibility of implicit use of packages.
https://yarnpkg.com/configuration/yarnrc#nmHoistingLimits
#### PR fixes following issue(s)
Fixes#23333
#### Type of change
- Chore (housekeeping or task changes that don't impact user perception)
## Testing
#### How Has This Been Tested?
- [x] Manual
- [x] Jest
- [x] Cypress
## Checklist:
#### Dev activity
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my own code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] PR is being merged under a feature flag
Co-authored-by: Valera Melnikov <melnikov.vv@greendatasoft.ru>
