config: add delta config and enhance lazygit with Dracula theme

- Extract delta configuration to dedicated managed config file
- Update lazygit with full Dracula theme and quality-of-life improvements
- Remove banner comments from config files for cleaner format
- Update git-related tool scripts (install-fonts, share utility)

home/dot_config/fontconfig/fonts.conf

@@ -11,10 +11,6 @@
 -->
 <fontconfig>
 
-  <!-- ============================================================
-       Global Rendering Settings
-       ============================================================ -->
-
   <!-- Enable antialiasing for smooth edges -->
   <match target="font">
     <edit name="antialias" mode="assign">
@@ -87,10 +83,6 @@
     </edit>
   </match>
 
-  <!-- ============================================================
-       Default Font Aliases
-       ============================================================ -->
-
   <!-- Sans-serif: Inter with Noto Sans fallback -->
   <alias>
     <family>sans-serif</family>
@@ -194,10 +186,6 @@
     </prefer>
   </alias>
 
-  <!-- ============================================================
-       Font-Specific Tweaks
-       ============================================================ -->
-
   <!--
     Geist Mono: Use slight hinting for clean rendering
     Geist Mono has good weight distribution