The two vex textures are located in `textures\entity\illager` instead of their own sub-folder

There is no dedicated folder for the two vex textures vex.png and vex_charging.png. This is unusual when compared to other entities that have multiple textures, where both are stored in their own sub folder for organization and clarity. It can be confusing and unintuative that they would be stored inside the illager sub-folder considering that they are not necessarily illager mobs (appearing as humanoid ill villagers), but instead frequently appear alongside other illager mobs.

Steps to Reproduce:

1. Go to the following file path:
   C:\Users[user]\AppData\Roaming\.minecraft\versions[latest_version]

2. Right click the [version].jar] file, and open it in a file explorer (like 7zip or winrar)

3. Go to the following path inside the jar:
   assets\minecraft\textures\entity\illager