refactor(fastfetch): merge the mac and kde configs into common

One Fastfetch package now serves both platforms. The logo is sent
inline through the kitty graphics protocol from a pre-encoded
albedo.kitty, which works in Ghostty and Kwi alike, so the separate
kitty-direct (mac) and Konsole (kde) variants are no longer needed.

common/fastfetch/build.py

@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+"""Encode albedo.png as kitty graphics escapes for fastfetch's "raw" logo.
+
+fastfetch's "kitty-direct" logo sends the terminal a file path (t=f), which
+Kwi ignores. This file carries the PNG inline (t=d) instead, so it works in
+any terminal with the kitty graphics protocol, Ghostty and Kwi included. q=2
+keeps the terminal from answering. Rerun after changing the image or the
+logo size.
+"""
+
+import base64
+from pathlib import Path
+
+DIR = Path(__file__).resolve().parent / ".config/fastfetch"
+# Logo size in cells; keep in sync with "width" and "height" in config.jsonc.
+COLS, ROWS = 20, 10
+
+
+def encode(png: bytes) -> bytes:
+    data = base64.b64encode(png)
+    chunks = [data[i : i + 4096] for i in range(0, len(data), 4096)]
+    out = bytearray()
+    for n, chunk in enumerate(chunks):
+        more = int(n < len(chunks) - 1)
+        if n == 0:
+            keys = b"a=T,f=100,t=d,c=%d,r=%d,q=2,m=%d" % (COLS, ROWS, more)
+        else:
+            keys = b"m=%d" % more
+        out += b"\x1b_G" + keys + b";" + chunk + b"\x1b\\"
+    return bytes(out)
+
+
+(DIR / "albedo.kitty").write_bytes(encode((DIR / "albedo.png").read_bytes()))