feat: added sqlc and binded schema.sql as postgresql's init script

sqlc/schema.sql

@@ -0,0 +1,47 @@
+-- TODO: login information must exist too
+CREATE TABLE IF NOT EXISTS "users" (
+  id BIGSERIAL PRIMARY KEY,
+  username VARCHAR(20) UNIQUE NOT NULL,
+  banned BOOLEAN NOT NULL,
+  registration_date TIMESTAMP NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS "login_informations"  (
+  id BIGSERIAL PRIMARY KEY,
+  user_id BIGINT UNIQUE NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  email VARCHAR(75),
+  password_hash VARCHAR(512) NOT NULL,
+  totp_encrypted VARCHAR(512),
+  email_2fa_enabled BOOLEAN,
+  password_change_time TIMESTAMP
+);
+
+CREATE TABLE IF NOT EXISTS "confirmation_codes" (
+  id BIGSERIAL PRIMARY KEY,
+  user_id BIGINT UNIQUE NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  type INTEGER NOT NULL,
+  code VARCHAR(36) NOT NULL,
+  expires_at TIMESTAMP NOT NULL,
+  used BOOLEAN,
+  deleted BOOLEAN
+);
+
+CREATE TABLE IF NOT EXISTS "sessions" (
+  id BIGSERIAL PRIMARY KEY,
+  user_id BIGINT UNIQUE NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  guid VARCHAR(36) NOT NULL,
+  name VARCHAR(100),
+  platform VARCHAR(32),
+  latest_ip VARCHAR(16),
+  login_time TIMESTAMP NOT NULL,
+  last_seen_date TIMESTAMP NOT NULL,
+  terminated BOOLEAN
+);
+
+CREATE TABLE IF NOT EXISTS "profiles" (
+  id BIGSERIAL PRIMARY KEY,
+  user_id BIGINT UNIQUE NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+  name VARCHAR(75) NOT NULL,
+  avatar_url VARCHAR(255),
+  birthday TIMESTAMP
+);