Create a template from a proposal

curl --request POST \
  --url https://api.propal.io/v1/templates \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "proposal_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "name": "<string>"
}
'

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "title": "<string>",
  "category": "<string>",
  "image": "<string>",
  "color": "<string>",
  "organization_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "created_at": "<string>"
}