Support for multiline values

### Description

Currently, the SwiftPaste component does not support multiline values. However, there are use cases where multiline values can be beneficial, such as when writing emails or longer messages. Adding support for multiline values would enhance the flexibility and usefulness of the component.

### Suggested Solution

To enable support for multiline values in SwiftPaste, I propose the following steps:

1. Modify the SwiftPaste component to allow multiline input for values.
2. Update the storage mechanism to handle multiline values without changing the storage format or structure.
3. Implement the necessary changes on the Options page to support multiline input in a user-friendly manner. This might involve adjusting the UI elements, such as text areas, to accommodate multiline values and provide a smooth editing experience.
4. Consider implementing validation or sanitization mechanisms to handle multiline values and prevent unintended issues.

By implementing these changes, users can utilize multiline values in SwiftPaste, enhancing its usability for scenarios requiring longer messages or content.

**Expected Outcome**
- Support for multiline values in the SwiftPaste component, allowing users to input and store multiline content.
- Enhanced usability and flexibility for writing emails, longer messages, and other scenarios that benefit from multiline support.
- A user-friendly editing experience on the Options page, accommodating multiline input and ensuring smooth navigation and interaction.

**Additional Notes**

Ensure the proposed changes align with the overall design vision and technical feasibility. Conduct thorough testing to validate the implementation and ensure that multiline values are handled correctly across different use cases.