Add dotfiles from home directory

Tracks shell configs (zsh/bash), vim, tmux, irssi, fonts, themes,
and ~/.local/bin scripts. Sensitive files (.ssh, .gnupg, history,
credentials) and large app data are excluded via .gitignore.

.themes/Dark Faenza/index.theme

@@ -0,0 +1,12 @@
+[Desktop Entry]
+Name=Dark Faenza
+Type=X-GNOME-Metatheme
+Comment=
+
+[X-GNOME-Metatheme]
+GtkTheme=BlackMATE
+MetacityTheme=BlackMATE
+IconTheme=Papirus-Dark
+GtkColorScheme=
+CursorTheme=bloom-dark
+CursorSize=36