✨ Emissive Maps

[softwareantics]

Description

• Updated IMaterial to support emission maps.
• Updated lighting.glsl to support emission maps.
• Added a default emission map to Material.

Fixes #307

Dependencies

There is no new dependencies introduced in this PR.

Type of change

• New feature (non-breaking change which adds functionality).

How Has This Been Tested?

I added an emission map to a material and simply ran the application to ensure it works.

Test Configuration:

• Operating System: Windows 11 Pro
• Hardware: Intel i9-10900 @ 2.80GHz, 32GB, RTX 3080
• Toolchain: VS Community 2022 x64

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• My changes generate no new warnings