feat: Add function to show nice help message

quickget

@@ -3694,6 +3694,53 @@ if [[ ! " $(os_support) " =~ " ${OS} " ]]; then
     echo -e "ERROR! ${OS} is not a supported OS.\n"
     os_support
     exit 1
+help_message() {
+    #shellcheck disable=SC2016
+    printf '                           _              _
+         __ _ _   _ _  ___║ ║ ____ _  ___║ ║_
+        / _` ║ ║ ║ ║ ║/ __║ ║/ / _` ║/ _ \ __║
+       ( (_║ ║ ║_║ ║ ║ (__║   < (_║ ║  __/ ║_      MIT
+        \__, ║\__,_║_║\___║_║\ \__, ║\___║\__║   license
+           ║_║  version: %s ║___/ part of QUICKEMU project
+ QEMU %s --------------------------------------------------
+         > Quickly create and run optimised Linux, <
+       > Windows and macOS desktop virtual machines. <
+   homepage   -    Not Yet
+  repository  - https://github.com/quickemu-project/quickemu
+ official GUI - https://github.com/quickemu-project/quickgui
+  by Wimpy https://github.com/flexiondotorg and contributors
+ Discord - https://discord.gg/wimpy-s-world-712850672223125565
+--------------------------------------------------------------
+
+Basic Usage:
+ quickget <os> <release> [edition]
+ quickget alpine latest
+
+Advanced Usage:
+ quickget <arg> [path] <os> [re] [ed]
+ quickget -d peppermint latest devuan-xfce
+
+Posible arguments:
+ --help             (-h)                : Show this help message and exit
+ --os-info          (-i) <os>           : Show info about OS
+ --os-homepage      (-o) <os>           : Open OS homepage in default browser
+ --iso-download     (-d) <os> <re> [ed] : Just download ISO
+ --custom           (-c) <os> <ISO path>: Create VM with downloaded ISO*
+ --version          (-v)                : Show version and exit
+ * To prepare custom VM config (Not supported by quickget) use:
+   quickget --custom <some name> <path to ISO>
+-------------- for developers / testing ----------------------
+ --list-json       (-lj)                : Show OS info in json format
+ --list-csv        (-lc)                : Show OS info in csv format
+ --list-supported  (-ls)                : List all supported OS,releases,editions
+ --list-isos       (-li)                : List all supported ISOs
+ --test-isos       (-ti)                : Test if ISOs are available
+--------------------------------------------------------------
+supported Operating Systems:\n' "$(quickemu --version)" "$(qemu-x86_64 -version | head -1 | cut -d' ' -f3)"
+    os_support | fold -s -w "$(tput cols)"
+    exit 0
+}
+
 fi
 
 if [ -n "${2}" ]; then