By Andrew Mills DOHA (Reuters) -Chad’s transitional authorities and rebel groups signed a peace agreement in Doha on Monday ahead of a broad national reconciliation dialogue to take place later this month. A signing ceremony for the agreement, which included the parties agreeing to take part in a national, inclusive dialogue, was attended by more than 30 rebel groups and followed months of talks in the Qatari capital. Details, such as how the deal will be implemented and how adherence to it will be monitored, were not immediately released. Mahamat Zene Cherif, the interim military government’s…