Editor: Share menu - Create Shortcut option is gone

### ⚠️ This issue respects the following points: ⚠️

- [X] This is a **enhancement/feature request**. Not a [bug or question](https://github.com/gsantner/markor/issues/new/choose).
- [X] The topic is **not** already reported at [Issues](https://github.com/gsantner/markor/issues?q=#js-issues-search). _(I've searched it)_.
- [X] Markor **is** up to date. See [Releases](https://github.com/gsantner/markor/tags) for the latest version. Updates are available from [F-Droid](https://f-droid.org/en/packages/net.gsantner.markor/) and GitHub.
- [X] The wanted feature/enhancement is not present in the latest development version (git master). (Please [download](https://nightly.link/gsantner/markor/workflows/build-android-project/master) and try the test version of Markor, named **Mordor**. Don't worry; Markor and Mordor appear as completely separate applications. You can install both side-by-side, and Markor's settings are not touched. If your desired feature is present, you don't need to open this issue. The change will be part of the next Markor update.)

### Description

Hi, I'm often using home screen shortcuts to quickly open files I use a lot. So I often add those links. To do this:
- I search for the file name I want to link to
- I open this file
- Here I'd like to be able to add a link to this file on the home screen; I expected to see the action "make a shortcut" in the editor context menu but there is no

Workaround for now:
- I search for the file name I want to link to
- I remember the path to this file (I do not actually open the file)
- I browse manually to the location of the file, search for the file with my eyes (sometimes very long as I've a ton of files in some folders)
- I long press on the file to select it
- Then I open context menu (via hamburger button) and I finally can drag'n drop my shortcut to the home screen

### Information

Android version: 12
App Version: 2.10.7

### Source

F-Droid

### Format / File type

Not specific

### Additional info / Log

```shell
> The wanted feature/enhancement is not present in the latest development version (git master)

I can't test it, it crashes when I start it :(
```

The issue identifies the editor context menu as the entry point and describes the existing shortcut action available from file selection. Start by tracing how that action creates a home-screen shortcut and how the editor menu is assembled. Done means a file opened from search can expose an equivalent action that creates a working home-screen shortcut; verify it on Android 12.

Written by the indexing model from the issue text.