feat: SuperCamo static class

[AlexStormwood]

This feature mostly already exists in v0.4.4. This issue is for tracking progress for this feature in the TypeScript rewrite of this package.

Tests to confirm this feature should be:

Golden Path Tests

• A SuperCamo static method should be able to create and connect to a new database, returning a NedbClient instance.
• A SuperCamo static method should be able to connect to a previously-created database, returning a NedbClient instance.
• A SuperCamo static method should be able to retrieve a list of names of all databases currently connected.
• A SuperCamo static method should be able to retrieve a singular NedbClient instance representing a connected database, just from a provided database name.
• A SuperCamo static property should exist as an object representing connected databases, with the name of each of the databases as the key for each connected database's NedbClient instance.
• A SuperCamo static method should be able to disconnect from a connected database.
• A SuperCamo static method should be able to disconnect from and delete a connected database.

Error-Handling Tests

• A SuperCamo static method won't connect to a database (and thus create a database client instance) if that database is already connected (is already an instance in the SuperCamo connected client list). This should throw an error.
• A SuperCamo static "clientDelete" method won't delete any databases or database data if no database matches a given name. This should NOT throw an error, but just return 0 (for "0 databases deleted").
• A SuperCamo static "clientDisconnect" method won't disconnect from any databases if no database matches a given name. This should NOT throw an error, but just return 0 (for "0 databases disconnected").

[AlexStormwood]

Closing as I can't think of anything else to add into this class right now, treating it as done & ready in the TypeScript rewrite branch.