docs(cleanup): remove redirected sdk/web.mdx page and flatten redirect chains

Author: dhruva-vapi

fern/chat/web-widget.mdx

@@ -471,7 +471,7 @@ Enhance your widget integration:
 * **[Assistant customization](/assistants)** - Fine-tune your assistant's behavior
 
 <Tip>
-The widget automatically handles microphone permissions, audio processing, and cross-browser compatibility. For custom implementations, consider using the [Web SDK](/sdk/web) directly.
+The widget automatically handles microphone permissions, audio processing, and cross-browser compatibility. For custom implementations, consider using the [Web SDK](/quickstart/web) directly.
 </Tip>
 
 <Callout>

fern/docs.yml

@@ -1046,9 +1046,9 @@ redirects:
   - source: /welcome
     destination: /quickstart/introduction
   - source: /sdks
-    destination: /sdk/web
+    destination: /quickstart/web
   - source: /server-sdks
-    destination: /sdk/web
+    destination: /quickstart/web
   - source: /overview
     destination: /quickstart
   - source: /assistants

fern/overview.mdx

@@ -142,7 +142,7 @@ Our SDKs are open source, and available on [our GitHub](https://github.com/VapiA
     icon="window"
     iconType="duotone"
     color="#ffdd03"
-    href="/sdk/web"
+    href="/quickstart/web"
   >
     Add a Vapi assistant to your web application.
   </Card>

fern/sdk/web.mdx

@@ -9,7 +9,7 @@ The Vapi Client SDKs automatically configure audio streaming to and from the cli
 The SDKs are open source, and available on GitHub:
 
 <CardGroup cols={3}>
-  <Card title="Vapi Web" icon="window" iconType="duotone" href="/sdk/web">
+  <Card title="Vapi Web" icon="window" iconType="duotone" href="/quickstart/web">
     Add a Vapi assistant to your web application.
   </Card>
   <Card

fern/sdks.mdx

@@ -1,6 +1,6 @@
 export const SdkCards = ({ iconColor }) => (
   <CardGroup cols={3}>
-    <Card title="Vapi Web" icon="window" iconType="duotone" color={iconColor} href="/sdk/web">
+    <Card title="Vapi Web" icon="window" iconType="duotone" color={iconColor} href="/quickstart/web">
       Add a Vapi assistant to your web application.
     </Card>
     <Card