Add E2E tests

[manulera]

Using cypress

[manulera]

• [x] Sources without inputs
• [x] Sources with inputs
  • [x] Restriction
  • [x] PCR
  • [x] Polymerase extension
  • [x] Ligation (sticky / blunt)
  • [x] Gibson assembly
  • [x] Homologous recombination
  • [x] CRISPR
  • [x] Restriction + ligation / Golden Gate
• [x] Delete source
• [x] Create / delete empty source + right options only
• [x] Tab navigation
• [x] Description
• [x] Data model visible
• [x] Primer form and list
• [x] Right behaviour when switching from multi-input to single input
• [x] Upload history
• [x] Download history
• [x] Load examples