feat: add rick and german flag blahaj style to help

src/builtins/help.rs

@@ -6,7 +6,7 @@ pub struct Help;
 
 impl Builtin for Help {
     fn execute(&mut self, _: &mut BuiltinConfig, _: Vec<String>) -> Result<(), ShellError> {
-        let commands = "blahaj          prints blahaj, styles: p, t
+        let commands = "blahaj          prints blahaj, styles: ger, p, t
             cd              changes current working directory
             change-prompt   changes prompt style (default, bashlike, simpledirectory)
             exit            exits the shell
@@ -17,6 +17,7 @@ impl Builtin for Help {
             open            shows content of files
             pwd             shows path to current working directory
             quote           prints a random quote
+            rick            plays rick rolls on YouTube
             segfault        exits, but the elegant way
             sus             shows amogus
             ";