feat: implement comprehensive multi-provider payment processing system

- Add unified payment provider architecture with contract-based design
  - Implement 6 payment providers: Stripe, Lemon Squeezy, Polar, Oxapay, Crypto, Activation Keys
  - Create subscription management with lifecycle handling (create, cancel, pause, resume, update)
  - Add coupon system with usage tracking and trial extensions
  - Build Filament admin resources for payment providers, subscriptions, coupons, and trials
  - Implement payment orchestration service with provider registry and configuration management
  - Add comprehensive payment logging and webhook handling for all providers
  - Create customer analytics dashboard with revenue, churn, and lifetime value metrics
  - Add subscription migration service for provider switching
  - Include extensive test coverage for all payment functionality

resources/views/filament/pages/customer-analytics.blade.php

@@ -0,0 +1,28 @@
+<x-filament-panels::page>
+    <form wire:submit.prevent="refresh">
+        <div class="space-y-6">
+            {{ $this->form }}
+
+            <div class="flex gap-2">
+                <x-filament::button
+                    type="submit"
+                    wire:loading.attr="disabled"
+                >
+                    <x-filament::loading-indicator class="h-5 w-5" wire:loading wire:target="refresh" />
+                    Apply Filters
+                </x-filament::button>
+
+                <x-filament::button
+                    wire:click="$reset"
+                    variant="outline"
+                >
+                    Reset
+                </x-filament::button>
+            </div>
+        </div>
+    </form>
+
+    <div class="mt-6">
+        {{ $this->table }}
+    </div>
+</x-filament-panels::page>