add server to monorepo.

packages/server/src/interfaces/Metable.ts

@@ -0,0 +1,28 @@
+
+
+export interface IMetadata {
+  key: string,
+  value: string|boolean|number,
+  group: string,
+  _markAsDeleted?: boolean,
+  _markAsInserted?: boolean,
+  _markAsUpdated?: boolean,
+};
+
+export interface IMetaQuery {
+  key: string,
+  group?: string,
+};
+
+export interface IMetableStore {
+  find(query: string|IMetaQuery): IMetadata;
+  all(): IMetadata[];
+  get(query: string|IMetaQuery, defaultValue: any): string|number|boolean;
+  remove(query: string|IMetaQuery): void;
+  removeAll(): void;
+  toArray(): IMetadata[];
+};
+
+export interface IMetableStoreStorage {
+  save(): Promise<void>;
+}