Adds creation of $HOME/.local/bin directory if not existing

On WSL for example there is no $HOME/.local/bin directory. This MR makes sure the directory is created before trying to move the file and getting an error.

Also the message to put the .local/bin in the path is more explicit.

installer.sh

@@ -3,13 +3,18 @@
 #
 # Distributed under terms of the GPLv3 license.
 
-{ \unalias command; \unset -f command; } >/dev/null 2>&1
+{
+	\unalias command
+	\unset -f command
+} >/dev/null 2>&1
 tdir=''
 gitedu_release_url="https://gitedu.hesge.ch/dojo_project/projects/ui/dojocli/-/releases/Latest"
 gitedu_prealpha_url="https://gitedu.hesge.ch/dojo_project/projects/ui/dojocli/-/releases/Latest"
 gitedu_url=$gitedu_release_url
 cleanup_success() {
-    printf "The dojo is installed in %s\nMake sure %s is in your path\n" "$dest" "$dest"
+	printf "The dojo is installed in %s\nMake sure %s is in your path\n" "$dest" "$destdir"
+	printf "If you are using bash you may want to append:\n"
+	printf "export PATH=\"\$PATH:%s\" to your .bashrc file.\n" "$destdir"
 	cleanup
 }
 
@@ -23,8 +28,8 @@ cleanup() {
 
 die() {
 	cleanup
-    printf "\033[31m%s\033[m\n\r" "$*" > /dev/stderr;
-    exit 1;
+	printf "\033[31m%s\033[m\n\r" "$*" >/dev/stderr
+	exit 1
 }
 
 detect_jq_tool() {
@@ -37,7 +42,6 @@ detect_jq_tool() {
 	fi
 }
 
-
 detect_network_tool() {
 	if command -v curl 2>/dev/null >/dev/null; then
 		fetch() {
@@ -72,11 +76,11 @@ detect_network_tool() {
 	fi
 }
 
-
 detect_os() {
 	arch=""
 	case "$(command uname)" in
-        'Darwin') OS="macos"
+	'Darwin')
+		OS="macos"
 		case "$(command uname -m)" in
 		amd64 | x86_64) arch="x64" ;;
 		aarch64*) arch="arm64" ;;
@@ -95,7 +99,7 @@ detect_os() {
 		*) die "dojo binaries are not available for $(command uname -m) architecture. See $gitedu_url to download manually" ;;
 		esac
 		;;
-        *) die "dojo binaries are not available for $(command uname). See $gitedu_url to download manually"
+	*) die "dojo binaries are not available for $(command uname). See $gitedu_url to download manually" ;;
 	esac
 }
 
@@ -106,23 +110,26 @@ expand_tilde() {
 }
 
 parse_args() {
-    dest='~/.local/bin'
-    [ "$OS" = "macos" ] && dest="/usr/local/bin"
+	destdir='~/.local/bin'
+	[ "$OS" = "macos" ] && destdir="/usr/local/bin"
 	installer=''
 	while :; do
 		case "$1" in
-            dest=*) dest="${1#*=}";;
+		destdir=*) destdir="${1#*=}" ;;
 		installer=*) installer="${1#*=}" ;;
 		"") break ;;
 		*) die "Unrecognized command line option: $1" ;;
 		esac
 		shift
 	done
-    dest=$(expand_tilde "${dest}")
-    dest="$dest/dojo"
+	destdir=$(expand_tilde "${destdir}")
+	if [ ! -d "$destdir" ]; then
+		printf "Directory %s does not exist. Creatring %s now.\n" "$destdir" "$destdir"
+		mkdir -p "$destdir"
+	fi
+	dest="$destdir/dojo"
 }
 
-
 get_file_url() {
 	url="https://gitedu.hesge.ch/api/v4/projects/12972/packages/generic/dojo"
 	if [ "$OS" = "macos" ]; then
@@ -138,7 +145,6 @@ get_release_url() {
 	get_file_url "$release_version"
 }
 
-
 get_prealpha_url() {
 	gitedu_url=$gitedu_prealpha_url
 	prealpha_version=$(fetch_and_get_version_quiet https://gitedu.hesge.ch/api/v4/projects/12972/releases/Pre-alpha)