First package split in dvote-js

[marcvelmer]

Two new packages created:

• common: Should be finished and ready for npm publish
• encryption: Several files missing like CHANGELOG, README, AUTHORS, LICENSE

The encryption package has a dependency from common via common.tgz file which should be changed for real npm published package.

Still not working: Tests in dvote-js (Error when trying to find vocdoni-common package) Already fixed by referencing packages locally. Adding also TODO for easy replacement when packages are published.

[brickpop]

Pending tasks:

• [x] Adapt the E2E scripts on the examples folder
• [x] Edit the main readme
• [ ] Publish dvote-js@1.14.0
• [x] Update the GitHub actions script, to run the tests on each individual package