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

backend/src/data/entities/AutoReaction.ts

@@ -0,0 +1,15 @@
+import { Entity, Column, PrimaryColumn } from "typeorm";
+import { ISavedMessageData } from "./SavedMessage";
+
+@Entity("auto_reactions")
+export class AutoReaction {
+  @Column()
+  @PrimaryColumn()
+  guild_id: string;
+
+  @Column()
+  @PrimaryColumn()
+  channel_id: string;
+
+  @Column("simple-array") reactions: string[];
+}