fix bugs in launcher script installation

- launcher scripts are installed *before* the configure script runs,
  so that if something goes wrong in the configure script, the user
  can run invoke.{sh,bat} and get the option to re-run configure
- fixed typo in invoke.sh which misspelled name of invokeai-configure

installer/installer.py

@@ -164,12 +164,12 @@ class Installer:
             optional_modules,
             find_links,
         )
-        # run through the configuration flow
-        self.instance.configure()
 
         # install the launch/update scripts into the runtime directory
         self.instance.install_user_scripts()
 
+        # run through the configuration flow
+        self.instance.configure()
 
 class InvokeAiInstance:
     """

installer/templates/invoke.sh.in

@@ -59,7 +59,7 @@ if [ "$0" != "bash" ]; then
             bash --init-file "$file_name"
             ;;
         6)
-            exec invokeai-config --root ${INVOKEAI_ROOT}
+            exec invokeai-configure --root ${INVOKEAI_ROOT}
             ;;
         7)
             exec invokeai --help