feat: initial installer release

Installer scripts and compose templates for deploying the Cameleer
SaaS platform. Supports multi-tenant SaaS and standalone modes.

Bootstrap:
  curl -fsSL https://registry.cameleer.io/.../get-cameleer.sh | bash

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

templates/docker-compose.tls.yml

@@ -0,0 +1,7 @@
+# Custom TLS certificates overlay
+# Adds user-supplied certificate volume to traefik
+
+services:
+  cameleer-traefik:
+    volumes:
+      - ./certs:/user-certs:ro