Multi tab Code Editor

### Please check before submitting an issue

- [X] I am using the latest version of App Manager
- [X] I have searched the issues and haven't found anything relevant
- [X] I have read the docs

### Describe a description of the new feature

Feature request for an option to view/search/edit multiple files at the same time with AM Code Editor.
This feature will be useful for multitasking for various purpose.

### Describe the solution you'd like

Something similar to 👇🏿

Screenshot source: [Acode](https://github.com/deadlyjack/Acode) | [F-Droid](https://www.f-droid.org/packages/com.foxdebug.acode/)

### Describe alternatives you've considered

_No response_

### Additional context

Currently AM supports only creating new file, there is no option to open your files from device storage.
Option to use open_with & share_to AM Code Editor would be nice.

App version : 3.2.0-alpha01-DEBUG (433)