Add database schema and Kysely packages

- Create initial database migration with full auth schema:
  - users, sessions, passkeys, devices tables
  - orgs, org_members, org_sites, org_invites tables
  - email_verifications, password_resets, login_requests tables
  - Indexes for common lookups and cleanup jobs
- Add @reviq/db-schema package with kysely-codegen
- Add @reviq/db package with Kysely client

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/db-schema/tsconfig.json

@@ -0,0 +1,15 @@
+{
+  "extends": "@macalinao/tsconfig/tsconfig.base.json",
+  "compilerOptions": {
+    "outDir": "./dist",
+    "rootDir": "./src",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "declaration": true,
+    "declarationMap": true,
+    "composite": true,
+    "types": ["node"]
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "dist"]
+}