Fix bridge iframe config (#8529)

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## PR-Codex overview
This PR updates references from `/bridge/embed` to `/bridge/widget` in the configuration files, reflecting a change in the iframe page used in the application.

### Detailed summary
- Updated `PAYMENT_METHOD_CONFIGURATION` comment in `.env.example` from `/bridge/embed` to `/bridge/widget`.
- Changed `source` in `next.config.ts` from `/bridge/embed` to `/bridge/widget`.
- Updated `source` path pattern in `next.config.ts` from `/bridge/embed/:path*` to `/bridge/widget/:path*`.

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<!-- This is an auto-generated comment: release notes by coderabbit.ai -->

## Summary by CodeRabbit

* **Documentation**
  * Updated configuration documentation.

* **Chores**
  * Updated internal routing paths in application configuration.

<sub>✏️ Tip: You can customize this high-level summary in your review settings.</sub>

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Author: MananTank

apps/dashboard/.env.example

@@ -67,5 +67,5 @@ STRIPE_SECRET_KEY=""
 GROWTH_PLAN_SKU=""
 PAYMENT_METHOD_CONFIGURATION=""
 
-# required for bridge iframe (/bridge/embed) page
+# required for bridge iframe (/bridge/widget) page
 NEXT_PUBLIC_BRIDGE_IFRAME_CLIENT_ID=""

apps/dashboard/next.config.ts

@@ -150,7 +150,7 @@ const baseNextConfig: NextConfig = {
             value: EmbedContentSecurityPolicy.replace(/\s{2,}/g, " ").trim(),
           },
         ],
-        source: "/bridge/embed",
+        source: "/bridge/widget",
       },
       {
         headers: [
@@ -159,7 +159,7 @@ const baseNextConfig: NextConfig = {
             value: EmbedContentSecurityPolicy.replace(/\s{2,}/g, " ").trim(),
           },
         ],
-        source: "/bridge/embed/:path*",
+        source: "/bridge/widget/:path*",
       },
     ];
   },