added a linux setup file

bin/linux/setup.sh

@@ -0,0 +1,11 @@
+echo Installing bakasable
+handle_error() {
+    echo "An error occurred on line $1"
+    rm -rf ~/.bakasable
+    exit 1
+}
+trap 'handle_error $LINENO' ERR
+mkdir -m 777 ~/.bakasable
+mkdir ~/.bakasable/cache
+cp ./bakasable ~/.bakasable/
+echo "export PATH=$PATH:~/.bakasable" >> ~/.bashrc