Reorganize project. Add folder for shared code between backend/dashboard. Switch from jest to ava for tests.

backend/src/data/entities/ReactionRole.ts

@@ -0,0 +1,22 @@
+import { Entity, Column, PrimaryColumn } from "typeorm";
+
+@Entity("reaction_roles")
+export class ReactionRole {
+  @Column()
+  @PrimaryColumn()
+  guild_id: string;
+
+  @Column()
+  @PrimaryColumn()
+  channel_id: string;
+
+  @Column()
+  @PrimaryColumn()
+  message_id: string;
+
+  @Column()
+  @PrimaryColumn()
+  emoji: string;
+
+  @Column() role_id: string;
+}