Use cargo features to separate out components

[123vivekr]

Currently, running the binary starts up the desktop UI also.

We could maybe use rust package features to effectively separate out the ui component and also the api-server component. This would allow for different modes of operation: as a library, a lib-server or a desktop app.

For example: In the cargo.toml,dnarchery = { version = "1.0", features = ["ui", 'api-server'] }