Add NFS client packages (nfs-common on Debian, nfs-utils on Alpine)

Needed for NFS mounts. Included in the best-effort CLI tools list so a
missing/conflicting package never aborts the bootstrap. README + header
updated.

install.sh

@@ -4,7 +4,7 @@
 # What it does:
 #   1. Detects the OS and package manager (apt on Debian, apk on Alpine).
 #   2. Installs base tooling (git, curl, wget, zsh, vim) + CLI tools
-#      (htop, fzf, nslookup, kubectl when available) for both distros.
+#      (htop, fzf, nslookup, nfs client, kubectl when available) for both distros.
 #   3. Installs oh-my-zsh (unattended) and the zsh-autosuggestions plugin.
 #   4. Deploys the generic server/ dotfiles.
 #   5. Installs Vim plugins (clones each plugin declared in .vimrc).
@@ -105,10 +105,11 @@ install_packages() {
     #   nslookup  -> dnsutils (Debian) / bind-tools (Alpine)
     #   fzf       -> community repo on Alpine, main on Debian
     #   htop      -> main on both
+    #   nfs client-> nfs-common (Debian) / nfs-utils (Alpine)  [for NFS mounts]
     if [ "$PKG" = "apk" ]; then
-        CLI_TOOLS="htop fzf bind-tools"
+        CLI_TOOLS="htop fzf bind-tools nfs-utils"
     else
-        CLI_TOOLS="htop fzf dnsutils"
+        CLI_TOOLS="htop fzf dnsutils nfs-common"
     fi
 
     if [ "$PKG" = "apk" ]; then