✨ feat: Add auth flow (#146)

This adds a simple way to incorporate a centralized authentication flow.

The idea is to have the user, API and SSH (for machine authentication)
all in one place using `openauthjs` + `SST`

We also have a database now :)

> We are using InstantDB as it allows us to authenticate a use with just
the email. Plus it is super simple simple to use _of course after the
initial fumbles trying to design the db and relationships_

packages/core/instant.schema.ts

@@ -0,0 +1,80 @@
+import { i } from "@instantdb/core";
+
+const _schema = i.schema({
+  // This section lets you define entities: think `posts`, `comments`, etc
+  // Take a look at the docs to learn more:
+  // https://www.instantdb.com/docs/modeling-data#2-attributes
+  entities: {
+    $users: i.entity({
+      email: i.string().unique().indexed(),
+    }),
+    // This is here because the $users entity has no more than 1 property; email
+    // profiles: i.entity({
+    //   name: i.string(),
+    //   location: i.string(),
+    //   createdAt: i.date(),
+    //   deletedAt: i.date().optional()
+    // }),
+    machines: i.entity({
+      hostname: i.string(),
+      location: i.string(),
+      fingerprint: i.string().indexed(),
+      createdAt: i.date(),
+      deletedAt: i.date().optional().indexed()
+    }),
+    // teams: i.entity({
+    //   name: i.string(),
+    //   type: i.string(), // "Personal" or "Family"
+    //   createdAt: i.date(),
+    //   deletedAt: i.date().optional()
+    // }),
+    // subscriptions: i.entity({
+    //   quantity: i.number(),
+    //   polarOrderID: i.string(),
+    //   frequency: i.string(),
+    //   next: i.date().optional(),
+    // }),
+    // productVariants: i.entity({
+    //   name: i.string(),
+    //   price: i.number()
+    // })
+  },
+  // links: {
+    // userProfiles: {
+    //   forward: { on: 'profiles', has: 'one', label: 'owner' },
+    //   reverse: { on: '$users', has: 'one', label: 'profile' },
+    // },
+    // machineOwners: {
+    //   forward: { on: 'machines', has: 'one', label: 'owner' },
+    //   reverse: { on: '$users', has: 'many', label: 'machinesOwned' },
+    // },
+    // machineTeams: {
+    //   forward: { on: 'machines', has: 'one', label: 'team' },
+    //   reverse: { on: 'teams', has: 'many', label: 'machines' },
+    // },
+    // userTeams: {
+    //   forward: { on: 'teams', has: 'one', label: 'owner' },
+    //   reverse: { on: '$users', has: 'many', label: 'teamsOwned' },
+    // },
+    // teamMembers: {
+    //   forward: { on: 'teams', has: 'many', label: 'members' },
+    //   reverse: { on: '$users', has: 'many', label: 'teams' },
+    // },
+    // subscribedProduct: {
+    //   forward: { on: "subscriptions", has: "one", label: "productVariant" },
+    //   reverse: { on: "productVariants", has: "many", label: "subscriptions" }
+    // },
+    // subscribedUser: {
+    //   forward: { on: "subscriptions", has: "one", label: "owner" },
+    //   reverse: { on: "$users", has: "many", label: "subscriptions" }
+    // }
+  // }
+});
+
+// This helps Typescript display nicer intellisense
+type _AppSchema = typeof _schema;
+interface AppSchema extends _AppSchema { }
+const schema: AppSchema = _schema;
+
+export type { AppSchema };
+export default schema;