Add scripting

[RiscadoA]

Checklist

C API

• Setup CMake and file structure for the C API core and engine libraries #1190
• Expose logging functions on the core C API #1202

Reflection

• Expose ConstructibleTrait on the core C API #1191
• Expose Type on the core C API #1192
• Expose FieldsTrait on the core C API #1193
• Expose ArrayTrait on the core C API #1194

ECS

• Expose Entity on the core C API #1195
• Expose World on the core C API #1196
• Expose Query on the core C API #1197
• Expose Commands on the core C API #1198
• Expose Cubos on the core C API #1199

Engine

• Expose defaultsPlugin on the engine C API #1200
• Expose input plugin and Input resource on the engine C API #1201

Lua

WIP

[luishfonseca]

We should allow users to extend the engine through scripting, working directly with the ECS.

The following should be possible:

• Declare new engine plugins
• Declare new components
• Program new systems

Additionally, it might be interesting to "break ECS" and allow users to attach behavior directly to Entities, like they might be used to from other engines. This could be done by adding a script component to the scripted entities. The flexibility might be worth it, especially for non time critical behavior.

[RiscadoA]

It should also be possible to define new resources.

[luishfonseca]

After the recruitment presentation, Dart was suggested