Add Zerene OS mainline (with more polished changes)

[gretagen]

Summary

This PR properly incorporates the Zerene OS logo into fastfetch.

• Closes [LOGO] Add Zerene OS Mainline #2402
• Resolves Add Zerene OS Mainline logo #2403

Changes

• Fixed errors in z.inc from the previous port attempt
• Properly adds the Zerene OS logo

Screenshots

Checklist

• [ X] I have tested my changes locally.

Here is what I have done to properly test my changes :

git clone https://github.com/gretagen/fastfetch-
cd fastfetch-
mkdir -p build
cd build
cmake ..
cmake --build . --target fastfetch
./fastfetch --list-logos
./fastfetch --logo Zerene

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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