docs(getting-started): workaround npm2yarn multi-line conversion is…

…sue with Tabs (#1999)

I've noticed that the `npm2yarn` plugin only converts the last line of
multi-command code blocks. This PR introduces a temporary workaround by
splitting the commands into individual code blocks within a Tabs
component. This change ensures that all commands are properly displayed
and converted for each package manager.

### Before

In the original documentation, a single code block with multiple
commands was used. However, only the last command was converted
correctly:
![original code
block](https://github.com/user-attachments/assets/883e53a3-4a6e-4a4e-8d0c-f6f1be337382)

### After

With the proposed change, the commands are split into separate tabs
(npm, yarn, pnpm, bun), each containing a single code block. This
guarantees that every command is correctly rendered:

![after
fixing](https://github.com/user-attachments/assets/bd5f685c-3e5d-41bf-82c2-30f033192637)

---------

Co-authored-by: Ward Peeters <ward@coding-tech.com>
Co-authored-by: Taofeeq Oluderu <oluderutaofeeq@gmail.com>
Co-authored-by: Ehindero Israel <iehindero419@stu.ui.edu.ng>
Co-authored-by: Abhi Aiyer <abhiaiyer91@gmail.com>

docs/src/pages/docs/getting-started/installation.mdx

@@ -101,12 +101,40 @@ cd hello-mastra
 
 Then, initialize a TypeScript project including the `@mastra/core` package:
 
-```bash copy npm2yarn
+<Tabs items={["npm", "pnpm", "yarn", "bun"]}>
+  <Tabs.Tab>
+```bash copy
 npm init -y
 npm install typescript tsx @types/node mastra@alpha --save-dev
 npm install @mastra/core@alpha zod
 npx tsc --init
 ```
+  </Tabs.Tab>
+  <Tabs.Tab>
+```bash copy
+pnpm init
+pnpm add typescript tsx @types/node mastra@alpha --save-dev
+pnpm add @mastra/core@alpha zod
+pnpm dlx tsc --init
+```
+  </Tabs.Tab>
+  <Tabs.Tab>
+```bash copy
+yarn init -y
+yarn add typescript tsx @types/node mastra@alpha --dev
+yarn add @mastra/core@alpha zod
+yarn dlx tsc --init
+```
+  </Tabs.Tab>
+  <Tabs.Tab>
+```bash copy
+bun init -y
+bun add typescript tsx @types/node mastra@alpha --dev
+bun add @mastra/core@alpha zod
+bunx tsc --init
+```
+  </Tabs.Tab>
+</Tabs>
 
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