update: loccalStorage persistance using externallibrary

cypress/integration/create-channel.spec.js

cypress/integration/create-job-offer.spec.js

cypress/integration/create-project.spec.js

cypress/integration/create-user.spec.js

cypress/integration/edit-channel.spec.js

cypress/integration/edit-job-offer.spec.js

cypress/integration/edit-project.spec.js

cypress/integration/retire-project.spec.js

cypress/integration/signin.spec.js

cypress/integration/signup.spec.js

cypress/support/commands.js

package-lock.json

package.json