feat: add Nerd Font installation, Yazi file manager, and themed Yazi config

- Install JetBrainsMono Nerd Font for icons across all TUI tools
- Add Yazi as terminal file manager with themed config per colorscheme
- Add write_yazi_config() to all 5 theme files
- Theme switcher (archduino-theme) now also updates Yazi
- Add 'y' alias for yazi in shell config
- Update step numbering (9 -> 11 steps) and README

lib/common.sh

@@ -13,7 +13,7 @@ NC='\033[0m'
 VERBOSE=true
 LOG_FILE="/tmp/archduino-install.log"
 CURRENT_STEP=0
-TOTAL_STEPS=10
+TOTAL_STEPS=12
 
 info() { echo -e "${GREEN}[✓]${NC} $1"; }
 warn() { echo -e "${YELLOW}[!]${NC} $1"; }
@@ -39,7 +39,7 @@ draw_progress() {
 }
 
 begin_quiet_mode() {
-  $IS_WSL && TOTAL_STEPS=11
+  $IS_WSL && TOTAL_STEPS=13
   : >"$LOG_FILE"
 
   # Save real terminal to fd 3/4, redirect everything else to log