feat: NovaCPX v1.0.0 initial scaffold

Full hosting control panel with 3 tiers: Admin, Reseller, User.
- install.sh: unattended installer for Ubuntu 20/22/24 + Debian 11/12
- PHP multi-version (7.4/8.1/8.2/8.3), Apache2/nginx choice, MySQL, PostgreSQL
- BIND9 DNS, Postfix+Dovecot mail, ProFTPD, Certbot SSL, UFW, Fail2Ban
- 18-table DB schema with audit log and version tracking
- PHP REST API (auth, system/updates, server stats, service control)
- Admin panel: dark dashboard, service manager, git-based update system
- User panel: usage rings + feature card grid (distinct from cPanel)
- VERSION file: git-tracked; Admin > Updates panel shows/applies git commits

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

panel/public/.htaccess

@@ -0,0 +1,17 @@
+Options -Indexes
+RewriteEngine On
+
+# Route API calls
+RewriteRule ^api/(.*)$ api/index.php [QSA,L]
+
+# Panel routes — serve index.php for SPA navigation within each panel tier
+RewriteCond %{REQUEST_FILENAME} !-f
+RewriteCond %{REQUEST_FILENAME} !-d
+RewriteRule ^(admin|reseller|user)/.*$ $1/index.php [QSA,L]
+
+# Security headers
+Header always set X-Frame-Options "SAMEORIGIN"
+Header always set X-Content-Type-Options "nosniff"
+Header always set X-XSS-Protection "1; mode=block"
+Header always set Referrer-Policy "strict-origin-when-cross-origin"
+Header always set Permissions-Policy "geolocation=(), microphone=(), camera=()"