added dependecy check

bml-cli

@@ -45,6 +45,16 @@ animate(){
 		printf "\r${@} [${anim:$h:1}]"
 	done
 }
+dependency_check(){
+  for DEPENDENCY; do
+    if ! command -v "$DEPENDENCY" 1>/dev/null; then
+      printf "%s not found. Please install it.\n" "$DEPENDENCY" >&2
+      exit 2
+    fi
+  done
+  unset DEPENDENCY
+}
+
 initialize(){
 	echo initalizing..
 	mkdir -p ~/.config/bml-cli/
@@ -766,6 +776,7 @@ init_login(){
 		enter_credentials
 	fi
 }
+dependency_check "curl" "jq" "openssl" "perl"
 display_banner && check_connection #& animate "Checking Internet Connection"
 source $CONFIG
 source $CREDENTIALS