Start preparing for multi-tenancy

[Powersource]

Related to #117

I thiiink the goal of this PR should be to get as close as possible to multi-tenancy as possible without actually adding it. Like adding db migrations, switching to keycloak etc. but in the end it should just look like a refactor to the user. lol this pr is basically just an issue for tracking all the multi-tenancy issues, prob gonna throw away the code in here.

• Get the user's tenantId from keycloak We're getting a list of the user's orgIds(tenantIds) from mongodb, see Connect to mongodb to get org info #145
• Add db migration
  • Add migration functionality. Tracked here Add possibility for db upgrades/migrations #143
  • Make sure that we can successfully get an orgId from the mongodb before we try to use it. We want to be able to get the value from Connect to mongodb to get org info #145
  • Add an Org node and a HAS rel from it to all nodes Add Org node that has a HAS relationship to all nodes (within that org) #156
• Switch to authing with keycloak Switch to keycloak from auth0 #121
• Create a node :Tenant with props tenantId and name We're instead gonna use https://github.com/Edgeryders-Participio/plato-core/ for this, see Connect to mongodb to get org info #145
• Change the routes to have the tenant's name at the start Add placeholder org name in slug #149
• Create missing (just placeholder so far) org and users in plato core db Create orgs and users that are missing in the mongodb #152
• Allow the user to switch between orgs (manually create a new one in the db) and only show them nodes from the orgs they're currently in Allow the user to switch between orgs #164 and Create an Org node in neo4j when entering an org that doesn't have one #168
• Allow the user to create new orgs Allow the user to create a new org #172
• Only allow the user to modify nodes with the orgId (tenantId) that they're currently viewing and that they have permission for Only allow the user to edit the org they're currently viewing, and only if they're a member of it #182

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[Powersource]

Now the last remaining task is #182 and we're probably not gonna use this PR so I'm gonna close this (although the code for that issue might look a bit like the code in this branch. funny how it's the last issue that would use the code I wrote first)