feat: add core-1 vs core-2 upgrade docs (#1915)

docs/upgrade-guides/core-2/backend.mdx

@@ -45,15 +45,15 @@ To run the CLI tool, navigate to your project and run it in the terminal:
 
 <CodeBlockTabs options={["npm", "yarn", "pnpm"]}>
   ```bash {{ filename: 'terminal' }}
-  npx @clerk/upgrade
+  npx @clerk/upgrade --from=core-1
   ```
 
   ```bash {{ filename: 'terminal' }}
-  yarn dlx @clerk/upgrade
+  yarn dlx @clerk/upgrade --from=core-1
   ```
 
   ```bash {{ filename: 'terminal' }}
-  pnpm dlx @clerk/upgrade
+  pnpm dlx @clerk/upgrade --from=core-1
   ```
 </CodeBlockTabs>
 

docs/upgrade-guides/core-2/chrome-extension.mdx

@@ -65,15 +65,15 @@ To run the CLI tool, navigate to your project and run it in the terminal:
 
 <CodeBlockTabs options={["npm", "yarn", "pnpm"]}>
   ```bash {{ filename: 'terminal' }}
-  npx @clerk/upgrade
+  npx @clerk/upgrade --from=core-1
   ```
 
   ```bash {{ filename: 'terminal' }}
-  yarn dlx @clerk/upgrade
+  yarn dlx @clerk/upgrade --from=core-1
   ```
 
   ```bash {{ filename: 'terminal' }}
-  pnpm dlx @clerk/upgrade
+  pnpm dlx @clerk/upgrade --from=core-1
   ```
 </CodeBlockTabs>
 

docs/upgrade-guides/core-2/expo.mdx

@@ -65,15 +65,15 @@ To run the CLI tool, navigate to your project and run it in the terminal:
 
 <CodeBlockTabs options={["npm", "yarn", "pnpm"]}>
   ```bash {{ filename: 'terminal' }}
-  npx @clerk/upgrade
+  npx @clerk/upgrade --from=core-1
   ```
 
   ```bash {{ filename: 'terminal' }}
-  yarn dlx @clerk/upgrade
+  yarn dlx @clerk/upgrade --from=core-1
   ```
 
   ```bash {{ filename: 'terminal' }}
-  pnpm dlx @clerk/upgrade
+  pnpm dlx @clerk/upgrade --from=core-1
   ```
 </CodeBlockTabs>
 

docs/upgrade-guides/core-2/fastify.mdx

@@ -45,15 +45,15 @@ To run the CLI tool, navigate to your project and run it in the terminal:
 
 <CodeBlockTabs options={["npm", "yarn", "pnpm"]}>
   ```bash {{ filename: 'terminal' }}
-  npx @clerk/upgrade
+  npx @clerk/upgrade --from=core-1
   ```
 
   ```bash {{ filename: 'terminal' }}
-  yarn dlx @clerk/upgrade
+  yarn dlx @clerk/upgrade --from=core-1
   ```
 
   ```bash {{ filename: 'terminal' }}
-  pnpm dlx @clerk/upgrade
+  pnpm dlx @clerk/upgrade --from=core-1
   ```
 </CodeBlockTabs>
 

docs/upgrade-guides/core-2/javascript.mdx

@@ -41,15 +41,15 @@ To run the CLI tool, navigate to your project and run it in the terminal:
 
 <CodeBlockTabs options={["npm", "yarn", "pnpm"]}>
   ```bash {{ filename: 'terminal' }}
-  npx @clerk/upgrade
+  npx @clerk/upgrade --from=core-1
   ```
 
   ```bash {{ filename: 'terminal' }}
-  yarn dlx @clerk/upgrade
+  yarn dlx @clerk/upgrade --from=core-1
   ```
 
   ```bash {{ filename: 'terminal' }}
-  pnpm dlx @clerk/upgrade
+  pnpm dlx @clerk/upgrade --from=core-1
   ```
 </CodeBlockTabs>
 

docs/upgrade-guides/core-2/nextjs.mdx

@@ -72,15 +72,15 @@ To run the CLI tool, navigate to your project and run it in the terminal:
 
 <CodeBlockTabs options={["npm", "yarn", "pnpm"]}>
   ```bash {{ filename: 'terminal' }}
-  npx @clerk/upgrade
+  npx @clerk/upgrade --from=core-1
   ```
 
   ```bash {{ filename: 'terminal' }}
-  yarn dlx @clerk/upgrade
+  yarn dlx @clerk/upgrade --from=core-1
   ```
 
   ```bash {{ filename: 'terminal' }}
-  pnpm dlx @clerk/upgrade
+  pnpm dlx @clerk/upgrade --from=core-1
   ```
 </CodeBlockTabs>
 

docs/upgrade-guides/core-2/node.mdx

@@ -48,15 +48,15 @@ To run the CLI tool, navigate to your project and run it in the terminal:
 
 <CodeBlockTabs options={["npm", "yarn", "pnpm"]}>
   ```bash {{ filename: 'terminal' }}
-  npx @clerk/upgrade
+  npx @clerk/upgrade --from=core-1
   ```
 
   ```bash {{ filename: 'terminal' }}
-  yarn dlx @clerk/upgrade
+  yarn dlx @clerk/upgrade --from=core-1
   ```
 
   ```bash {{ filename: 'terminal' }}
-  pnpm dlx @clerk/upgrade
+  pnpm dlx @clerk/upgrade --from=core-1
   ```
 </CodeBlockTabs>
 

docs/upgrade-guides/core-2/react.mdx

@@ -65,15 +65,15 @@ To run the CLI tool, navigate to your project and run it in the terminal:
 
 <CodeBlockTabs options={["npm", "yarn", "pnpm"]}>
   ```bash {{ filename: 'terminal' }}
-  npx @clerk/upgrade
+  npx @clerk/upgrade --from=core-1
   ```
 
   ```bash {{ filename: 'terminal' }}
-  yarn dlx @clerk/upgrade
+  yarn dlx @clerk/upgrade --from=core-1
   ```
 
   ```bash {{ filename: 'terminal' }}
-  pnpm dlx @clerk/upgrade
+  pnpm dlx @clerk/upgrade --from=core-1
   ```
 </CodeBlockTabs>
 

docs/upgrade-guides/core-2/remix.mdx

@@ -65,15 +65,15 @@ To run the CLI tool, navigate to your project and run it in the terminal:
 
 <CodeBlockTabs options={["npm", "yarn", "pnpm"]}>
   ```bash {{ filename: 'terminal' }}
-  npx @clerk/upgrade
+  npx @clerk/upgrade --from=core-1
   ```
 
   ```bash {{ filename: 'terminal' }}
-  yarn dlx @clerk/upgrade
+  yarn dlx @clerk/upgrade --from=core-1
   ```
 
   ```bash {{ filename: 'terminal' }}
-  pnpm dlx @clerk/upgrade
+  pnpm dlx @clerk/upgrade --from=core-1
   ```
 </CodeBlockTabs>
 

docs/upgrade-guides/nextjs/v6.mdx

@@ -5,9 +5,19 @@ description: Learn how to upgrade your application to use the latest Clerk Next.
 
 To upgrade to `@clerk/nextjs` v6, use the upgrade CLI:
 
-```bash {{ filename: 'terminal' }}
-npx @clerk/upgrade
-```
+<CodeBlockTabs options={["npm", "yarn", "pnpm"]}>
+  ```bash {{ filename: 'terminal' }}
+  npx @clerk/upgrade
+  ```
+
+  ```bash {{ filename: 'terminal' }}
+  yarn dlx @clerk/upgrade
+  ```
+
+  ```bash {{ filename: 'terminal' }}
+  pnpm dlx @clerk/upgrade
+  ```
+</CodeBlockTabs>
 
 The CLI will walk you through the upgrade and apply necessary changes to your application automatically.