Update identifiers to be consistent.

Make server optionally have a mountpoint for putting assets.

Attempt to connect client to server.

Add tests for initialization and teardown for all input methods.

Correctly dereference pointers.

Declare variables early on.

Use short names for int types.

Provide default states for input and output.

The game now uses MIDI support for alternative input methods.

Put I/O values to their respective structs.

Ensure joystick direction enum names are consistent.

Determine config path only once.

Ensure one type of test can only be handled at a time.

Implement tests for joystick axis, hat, and button events.

Add third-party mocks, specify mock files.

/? Do we need first-party mocks in their own files, or can we provide a
mock flag in the implementation files already?

Make device handling opt-in.