make help better

profile.d/help.sh

@@ -36,9 +36,21 @@
 
 # ------------------------------------------------------------------------------
 # Display list of commands and general informations
-# Usage: help
+# Usage: help [command]
 help()
 {
+    # If a command name is given, delegate to its --help output.
+    if [[ $# -gt 0 && "$1" != "--help" && "$1" != "-h" ]]; then
+        local cmd="$1"
+        if declare -F "$cmd" >/dev/null 2>&1 || command -v "$cmd" >/dev/null 2>&1; then
+            "$cmd" --help
+        else
+            disp E "Unknown command: $cmd"
+            return 1
+        fi
+        return
+    fi
+
     # shellcheck disable=SC2154 # color code in disp.sh
     # shellcheck disable=SC2059 # printf format is a color variable
     printf "${BIWhite}Welcome to your profile! Here is a list of available commands:${DEFAULTCOL}\n\n"