bigger summary field, fix select2 autocomplete, wip frontend categorization

contracts/forms.py

contracts/migrations/0005_alter_contract_summary.py

...migrations/0006_alter_contract_approval_state_and_more.py

contracts/models.py

contracts/templates/contracts/index.html

contracts/templates/contracts/view_contract.html

contracts/views.py

package.json

tailwind.config.js