PT-3266: Platform decoupling R&D project result (Do not merge!)

[tatarincev]

The main idea is to decouple the current platform solution from the next functional parts

• Security
• Manager UI
• Assets
• Hangfire
• Swagger and move them out into standalone modules.

By these changes we address the following problems:

• Frequent platform releases, because of receive platform updates is not streamlined for our customers.
• Low cohesion of platform solution
• Unable to update some holding by platform runtime dependencies (Hangfire, AzureBlob, etc) without enforcing customer to update whole platform application.
• Tightly coupling with web interface (manager) which is redundant when you have to host a platform as a service without any UI.
• Works without access to a database