(core) move home server into core

Summary: This moves enough server material into core to run a home server.  The data engine is not yet incorporated (though in manual testing it works when ported).

Test Plan: existing tests pass

Reviewers: dsagal

Reviewed By: dsagal

Differential Revision: https://phab.getgrist.com/D2552

app/gen-server/entity/AclRule.ts

@@ -0,0 +1,58 @@
+import {BaseEntity, ChildEntity, Column, Entity, JoinColumn, ManyToOne, OneToOne,
+        PrimaryGeneratedColumn, RelationId, TableInheritance} from "typeorm";
+
+import {Document} from "./Document";
+import {Group} from "./Group";
+import {Organization} from "./Organization";
+import {Workspace} from "./Workspace";
+
+@Entity('acl_rules')
+@TableInheritance({ column: { type: "int", name: "type" } })
+export class AclRule extends BaseEntity {
+
+  @PrimaryGeneratedColumn()
+  public id: number;
+
+  @Column()
+  public permissions: number;
+
+  @OneToOne(type => Group, group => group.aclRule)
+  @JoinColumn({name: "group_id"})
+  public group: Group;
+}
+
+
+@ChildEntity()
+export class AclRuleWs extends AclRule {
+
+  @ManyToOne(type => Workspace, workspace => workspace.aclRules)
+  @JoinColumn({name: "workspace_id"})
+  public workspace: Workspace;
+
+  @RelationId((aclRule: AclRuleWs) => aclRule.workspace)
+  public workspaceId: number;
+}
+
+
+@ChildEntity()
+export class AclRuleOrg extends AclRule {
+
+  @ManyToOne(type => Organization, organization => organization.aclRules)
+  @JoinColumn({name: "org_id"})
+  public organization: Organization;
+
+  @RelationId((aclRule: AclRuleOrg) => aclRule.organization)
+  public orgId: number;
+}
+
+
+@ChildEntity()
+export class AclRuleDoc extends AclRule {
+
+  @ManyToOne(type => Document, document => document.aclRules)
+  @JoinColumn({name: "doc_id"})
+  public document: Document;
+
+  @RelationId((aclRule: AclRuleDoc) => aclRule.document)
+  public docId: number;
+}