feat: add initial setup for KrothiumAPI with .htaccess and index.php

- Created .htaccess for URL rewriting to route all requests to index.php
- Added index.php to bootstrap the KrothiumAPI with environment variables and configuration settings
- Configured application mode, paths, router settings, session management, error logging, and logging driver

public/.htaccess

@@ -0,0 +1,10 @@
+<IfModule mod_rewrite.c>
+    RewriteEngine On
+
+    # Se for arquivo ou pasta real, deixa passar
+    RewriteCond %{REQUEST_FILENAME} !-f
+    RewriteCond %{REQUEST_FILENAME} !-d
+    
+    # Tudo vai pro front controller
+    RewriteRule ^ index.php [L,QSA]
+</IfModule>