Update Kernel.php for writable base handling, add .htaccess for routing, and modify manifest.json and liara.json

- Refactored Kernel.php to ensure writable base directory is set correctly for production on Liara.
- Added .htaccess file to forward requests to the public directory, addressing the limitation of Liara's PHP platform.
- Updated manifest.json with new modification times and AST hashes for affected files.
- Minor formatting change in liara.json to ensure proper file structure.

.htaccess

@@ -0,0 +1,22 @@
+# Liara's generic PHP platform serves the project root as DocumentRoot and offers
+# no way to point it at public/ (only the dedicated "laravel" platform does that
+# automatically, but that would run artisan/npm — wrong for Symfony). Symfony's
+# recommended setup is DocumentRoot=public/; since that's unavailable here, forward
+# every request into public/ and let public/.htaccess route to index.php.
+DirectoryIndex public/index.php
+
+<IfModule mod_rewrite.c>
+    RewriteEngine On
+
+    # Block direct external access to the public/ prefix (e.g. /public/index.php).
+    # Real assets are referenced as /build/... not /public/... . THE_REQUEST holds
+    # the ORIGINAL request line, so this does NOT match the internal rewrite below.
+    RewriteCond %{THE_REQUEST} \s/+public/ [NC]
+    RewriteRule ^ - [R=404,L]
+
+    # Forward everything into public/. The negative lookahead (?!public/) stops the
+    # internal rewrite from looping (public/ -> public/public/...). Anything outside
+    # public/ (e.g. /.env, /src/...) maps to a non-existent public/<path> and falls
+    # through to the front controller as a 404 — root files are never served.
+    RewriteRule ^(?!public/)(.*)$ public/$1 [L]
+</IfModule>