Script store

Add a ScriptStore like the VivyDocumentStore to manage all script files. The "Store" API has been cleaned-up, now we are using CRTP (again) and most of the code has been factorized.

src/Lib/Document/VivyDocument.hh

@@ -69,8 +69,8 @@ public:
     std::shared_ptr<AssSubDocument> getAssSubDocument() const noexcept;
 
     QString getName() const noexcept override;
-    Uuid getUuid() const noexcept;
     QString getDocumentCapabilitiesString() const noexcept;
+    Uuid getUuid() const noexcept override;
 
     bool checkDocumentCapabilities(Capabilities) const noexcept;
     bool checkDocumentOption(Options) const noexcept;