[FEATURE] Enable the ability to have multi user instances (#158)

* multi user wip

* WIP MUM features

* invitation mgmt

* suspend or unsuspend users

* workspace mangement

* manage chats

* manage chats

* add Support for admin system settings for users to delete workspaces and limit chats per user

* fix issue ith system var
update app to lazy load invite page

* cleanup and bug fixes

* wrong method

* update readme

* update readme

* update readme

* bump version to 0.1.0