Add documentation for sprites and animation management.

Demonstrate on-the-fly flip for sprites.

Make use of sprite loading to streamline the sprite management process.

The sprites are now loaded using a utility function in IZ_video.

The magazines for each weapon except the rifles have been drawn.

Remove symlinks and make codebase use common modules instead.

Rename files in order to prepare for extraction for publishing
subsystems independently.

Unify config loading in net and video subsystems.

Put input and video subsystems into their own directories.

Split the network events to the net directory to keep the app code
implementation clean.

Attempt to connect client to server.

Ensure mounts are configurable.

Add libwebsockets client to game executable.

Properly mock video function dependencies.

Correctly dereference pointers.

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 each initialization method is in its own source.

Determine config path only once.

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.