Add docs folder and design of users

docs/users_roles_permissions.md

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+# Users, Roles and Permissions
+
+This is the design document for https://gitea.toal.ca/oys/bab-app/issues/11
+
+## Backend Concepts
+
+Utilizing the AppWrite backend provides us with some basic concepts we can use:
+
+### Users, Groups, and Labels
+
+#### Teams
+
+Teams are AppWrite groups of users. Teams can be assigned roles, which can be assigned permissions. Teams "contain" users. A team has more permissions to manage it's members than labels, which are assigned / removed, rather than 'invited / left'.
+
+#### Labels
+
+Labels are AppWrite tags for users. Users have Labels as attributes. Like teams, labels can be used for Role / Permission mapping.
+
+### Permissions
+
+https://appwrite.io/docs/advanced/platform/permissions
+
+Permissions are fine-grained access control for users and objects. They follow standard "CRUD" patterns.
+
+## BAB Concepts
+
+For teams, there will, to start, be the following:
+
+- `staff` : Individuals with authority / responsibilities
+  - `maintenance` : Staff responsible for maintenance (eg: Boatswain)
+  - `admin`: Administrators of the program / application
+- `school` : Members of the Sailing School (Instructors & Students)
+  - `student` role : A student in the school
+  - `instructor` role: An instructor in the school
+- `bab` : Members of the BAB program
+  - `skipper` role: A member who has passed skipper certification
+
+The following are the initial labels:
+
+- TBD