Bash manual and animal example added

ChangeLog

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+2024-06-30  hwpplayer1  <hwpplayer1@debian>
+
+	* bash.pdf: BASH Manual added
+
+	* animal.sh: animal bash example
+
+	* hello.sh: hello world example
+

animal.sh

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+echo -n "Enter the name of an animal: "
+read ANIMAL
+echo -n "The $ANIMAL has "
+case $ANIMAL in 
+    horse | dog | cat) echo -n "four";;
+    man | kangaroo ) echo -n "two";;
+    *) echo -n "an unknown number of";;
+esac
+echo " legs."