Add an FAQ and/or high-level overview of how to integrate TUF

We are often asked the same questions regarding delegations, how to organize TUF metadata, key management, etc. There should be an FAQ page for these sorts of questions.

The Survivable Key Compromise paper provides an overview of TUF's design, and the specification and other documents available here capture most of what it contains. However, the integration side of things is not adequately explained outside of the Diplomat and Mercury papers. The PEP 458 document is also a good resource for how to integrate TUF with an existing software updater and community repository.

We should provide a condensed, high-level document that contains the information in the papers and documents that have been written since the Survivable Key Compromise paper.

Revisa los artículos Survivable Key Compromise, Diplomat y Mercury, junto con el documento PEP 458 y los materiales existentes de especificación de TUF. Organiza sus indicaciones de integración en una FAQ condensada o una descripción general de alto nivel que cubra las delegaciones, la organización de metadatos y la gestión de claves; se considera terminada cuando las preguntas recurrentes sobre la integración estén explicadas en un único documento accesible.