Extract "Code Strategy Assessment Framework" into its own pattern

The Unified Source Code Inventory mentions the concept of a Source Code Strategy Assessment Framework.

I believe that such a framework could be useful even for companies that are only using a single version control system, and hence don't need to unify their source code inventory further (because they already have a single inventory).

Therefore I am proposing to pull the Source Code Strategy Assessment Framework into a pattern of its own, which can then be references from the Unified Source Code Inventory and other patterns.

Inizia da patterns/1-initial/source-code-inventory.md e rivedi il Source Code Strategy Assessment Framework collegato in trieshard/source-strategy-assessment. Definisci il framework come pattern autonomo, quindi aggiorna il Unified Source Code Inventory e gli altri pattern pertinenti in modo che vi facciano riferimento. Il lavoro è completo quando il framework è documentato in modo indipendente e i riferimenti esistenti puntano ad esso.