Use the .env icon for all .env* files

Currently, only .env receives the dedicated environment-file icon, while files like .env.example fall back to a generic icon.

I’d love for Vira Theme to use the same .env icon for common .env variants too, such as:

• .env.example

• .env.local

• .env.development

• .env.production

• .env.test

• .env.staging

• .env.*

This would make env-related files easier to recognize at a glance and keep them visually grouped.

Expected behavior:
Any file that starts with .env should use the .env icon, not the generic fallback icon.

Why this helps:
These files are all clearly part of the same env/config family, and most projects use several of them.