docs(libraries/template): create template documentation

apps/docs/src/content/docs/libraries/template.mdx

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+---
+title: template
+description: Template documentation page for creating new libraries.
+---
+
+## 📦 Overview
+
+### What it does
+
+Provide a clear, concise overview of the purpose and capabilities of the library.
+
+### Key Features
+
+Highlight the main features of the library in bullet points or brief descriptions.
+
+### How to use
+
+#### Basic Usage Example
+
+Show a minimal example of how to set up and use the library.
+
+---
+
+## 📖 API Reference
+
+### `myAction` Function
+
+- **Description**: 
+- **Parameters**: 
+- **Return Type**: 
+
+### `myThing` Object
+
+- **Properties**
+  - `FirstProperty`: 
+
+### Error Handling
+
+Explain how errors are thrown during validation and show example outputs for invalid variables.
+
+---
+
+## 🛠️ Commands
+
+### View all commands
+
+To view all commands from the library's `project.json`, `package.json` and inheritted:
+```sh title="Terminal"
+pnpm nx show project <lib>
+```
+
+### Focus library usage
+
+To view/focus on all the apps & libraries which use this library:
+```sh title="Terminal"
+pnpm nx graph --focus <lib>
+```
+
+---
+
+## 📝 Contributing
+
+### Best Practices
+
+#### Code Formatting
+
+Include instructions or links to code style guides, like Prettier/ESLint.
+
+The library should be linted without any errors:
+```sh title="Terminal"
+pnpm nx run <lib>:lint
+```
+
+#### Testing
+
+To run tests for this library:
+```sh title="Terminal"
+pnpm nx run <lib>:test
+```
+
+---
+
+## ❓ FAQs
+
+### What happens if ...?
+
+Provide an answer along with an example error message.
+
+### Can I add ...?
+
+Show an example of adding more to the library.
+
+---
+
+## 🛑 Troubleshooting
+
+### Common Errors
+
+#### Invalidity
+
+Describe a common invalidity issue and how to fix it, along with an example error output.