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>

get-cameleer.ps1

@@ -0,0 +1,57 @@
+#Requires -Version 5.1
+<#
+.SYNOPSIS
+  Bootstrap script — downloads the Cameleer installer and runs it.
+.EXAMPLE
+  irm https://registry.cameleer.io/cameleer/cameleer-saas-installer/raw/branch/main/get-cameleer.ps1 | iex
+  .\get-cameleer.ps1 -Version v1.2.0
+#>
+param(
+    [string]$Version,
+    [string]$Ref,
+    [switch]$Run
+)
+
+$ErrorActionPreference = 'Stop'
+
+$Repo = 'https://registry.cameleer.io/cameleer/cameleer-saas-installer/raw'
+if ($Version) { $RefPath = "tag/$Version" }
+elseif ($Ref) { $RefPath = "branch/$Ref" }
+else          { $RefPath = 'branch/main' }
+
+$Base = "$Repo/$RefPath"
+$Dir  = '.\installer'
+
+$Files = @(
+    'install.sh'
+    'templates/docker-compose.yml'
+    'templates/docker-compose.saas.yml'
+    'templates/docker-compose.server.yml'
+    'templates/docker-compose.tls.yml'
+    'templates/docker-compose.monitoring.yml'
+    'templates/traefik-dynamic.yml'
+    'templates/.env.example'
+)
+
+Write-Host 'Downloading Cameleer installer...'
+
+New-Item -ItemType Directory -Path "$Dir\templates" -Force | Out-Null
+
+foreach ($file in $Files) {
+    $localPath = Join-Path $Dir $file
+    $localDir  = Split-Path $localPath -Parent
+    if (-not (Test-Path $localDir)) { New-Item -ItemType Directory -Path $localDir -Force | Out-Null }
+
+    Write-Host "  $file"
+    Invoke-WebRequest -Uri "$Base/$file" -OutFile $localPath -UseBasicParsing
+}
+
+Write-Host ''
+Write-Host "Installer ready in $Dir\"
+Write-Host 'Run:  cd installer; .\install.sh'
+Write-Host ''
+
+if ($Run) {
+    Set-Location $Dir
+    & .\install.sh @args
+}