Initial import: chezmoi source for CachyOS + Umbriel + Noctalia

Imported from prdlk/dotfiles master (efdd827). Drops the niri, Hyprland/Omarchy,
macOS, and Blume docs-site layers; docs/ is plain Markdown.

dot_config/fontconfig/fonts.conf

@@ -0,0 +1,12 @@
+<?xml version="1.0"?>
+<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
+<fontconfig>
+  <match target="pattern">
+    <test name="family" qual="any">
+      <string>monospace</string>
+    </test>
+    <edit name="family" mode="prepend_first" binding="strong">
+      <string>VictorMono Nerd Font</string>
+    </edit>
+  </match>
+</fontconfig>