Multitenant architecture

[bartolomej]

Problem

The current hosted version (at https://app.flowser.dev) doesn't support multitenancy, which makes it usefull only for a single user at a time.

Solution

Extend flowser functionality to support multiple users.

• temprarily store a project and make it excessible via url, so that user's can share it
• implement a simple user system, so that user can permanently store projects under his/her account
• support running multiple flowser managed emulators (extend flow/flow-emulator.service.ts)
• alert the user when app reaches it's user capacity (add the user to queue - similar to how expo does it)
• show network configuration, so that user can add it to flow.json file on his computer and access the network with flow-cli