feat(clients): add nim-allographer client with BaraDB driver support

- Pure Nim wire protocol client (async + sync, no C FFI)
- Query Builder: fluent API, SQL generator, execution, transactions
- Schema Builder: create/alter/drop tables, column operations
- Connection pool with aging and timeout handling
- ORM integration via compile-time DB_BARADB switch
- Tests: test_open, test_query
- Documentation: README.md, PLAN_BARADB.md

clients/nim-allographer/docker/adminer/login-password-less.php

@@ -0,0 +1,9 @@
+<?php
+require_once('plugins/login-password-less.php');
+ 
+/** Set allowed password
+ * @param string result of password_hash
+ */
+return new AdminerLoginPasswordLess(
+    $password_hash = password_hash("pass", PASSWORD_DEFAULT)
+);