Add compatibility for macOS and *NIX files

TODO: inspect building of dependencies

Instead of using macros, use iterators built-in on each list for
filtering and traversing.

Provide support for XInput mappings.

Specify documentation for controls and weapon modes.

Add some missing parts.

Use common terms for geometry groups.

Add documentation for sprites and animation management.

Demonstrate on-the-fly flip for sprites.

Update items related to weapons.

Some contents for deliberation.

TODO comments for implementation.

Make distinctions between internal and external (downloaded from
third-party servers).

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

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

Fill out data for Ordinator.

The weapon sprites are now exported to SVG.

There is a new weapon called Ordinator which fires 20 rounds of .45 ACP.

The bullets have been improved. Also, file structure for weapons is
being drafted.

Ensure no transforms are done with the sprite components.

The magazine for Paragon is now drawn. Also the weapons showcase is
added for showing all the available geometry of all the weapons.

Ensure magazine is completely drawn.

Fix sprite grouping, add more neutral codenames to weapons.

Use measurements from CIP.

Use construction sheet for 9mm.

Draw the rifle bullets according to dimension charts.

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

Add remarks for M9.

Small changes to weapons sprites.

We'll just use the flipped versions for ease of development.

Include weapon sprites, however the flipped versions need re-tracing
details.

Specify final list of weapons in the game. Add additional details for
information on sprites.

Add custom enums for making sense of returned values from config and
game app code.

Organize audio. The sfx are also rearranged.

Ensure every config-backed subsystem can serialize/deserialize config in
a single consistent manner.

Add templates for config item types.

Also updated server's config to use the global config module.

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.

Make sure to have help messages for both the game and the server.

Make the member name generic to accommodate other potential
implementations beyond Websockets.

Include tools for testing various parts of the app

Put shell sounds to their own directory.

Rename audio to corresponding audio event.

Provide latest versions of the files.

Provide the facility for the player to retry a failed connection a
certain number of times.

Assets for weapons.

This file is unnecessary.

Use appropriate identifier for function that runs network thread.

Put input and video subsystems into their own directories.

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

Ensure no side effect persists when errors have been triggered.