feat: auth, site creation with PHP version selection

migrations/000002_php_versions.down.sql

@@ -0,0 +1 @@
+DROP TABLE IF EXISTS php_versions;

migrations/000002_php_versions.up.sql

@@ -0,0 +1,15 @@
+-- PHP versions available for sites
+
+CREATE TABLE php_versions (
+    version     VARCHAR(16) PRIMARY KEY,
+    is_active   BOOLEAN NOT NULL DEFAULT true,
+    sort_order  INT NOT NULL DEFAULT 0
+);
+
+INSERT INTO php_versions (version, is_active, sort_order) VALUES
+    ('7.4', false, 1),
+    ('8.0', false, 2),
+    ('8.1', true,  3),
+    ('8.2', true,  4),
+    ('8.3', true,  5),
+    ('8.4', true,  6);