Add kickstart profile selection to configure.sh

After server checks pass, present all ks_base_profiles/*.cfg files
with their first-paragraph description and require the user to pick
one. The selected profile is copied to ks.cfg in the repo root.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

system_setup/configure.sh

@@ -103,6 +103,34 @@ while true; do
         continue
     fi
 
+    echo ""
+    echo "=== Select Kickstart Profile ==="
+    KS_DIR="${SCRIPTDIR}/../ks_base_profiles"
+    KS_DEST="${SCRIPTDIR}/../ks.cfg"
+
+    mapfile -t KS_FILES < <(find "$KS_DIR" -maxdepth 1 -name "*.cfg" | sort)
+    if [[ ${#KS_FILES[@]} -eq 0 ]]; then
+        echo "No kickstart profiles found in ${KS_DIR}."
+        exit 1
+    fi
+
+    echo ""
+    for i in "${!KS_FILES[@]}"; do
+        desc=$(awk '/^$/{exit} {print}' "${KS_FILES[$i]}" \
+               | sed 's/^#[[:space:]]*//' | tr '\n' ' ' | xargs)
+        printf "  %d) %-36s %s\n" "$((i+1))" "$(basename "${KS_FILES[$i]}")" "$desc"
+    done
+    echo ""
+
+    while true; do
+        read -rp "Select profile [1-${#KS_FILES[@]}]: " sel
+        [[ "$sel" =~ ^[0-9]+$ ]] && (( sel >= 1 && sel <= ${#KS_FILES[@]} )) && break
+        echo "  Invalid selection, please enter a number between 1 and ${#KS_FILES[@]}."
+    done
+
+    cp "${KS_FILES[$((sel-1))]}" "$KS_DEST"
+    echo "Copied '$(basename "${KS_FILES[$((sel-1))]}")' to ${KS_DEST}."
+
     echo ""
     echo "=== Configuration complete ==="
     echo "All values have been configured and verified successfully."