Shortcut file to access straight to the vault password log-in

### Please agree to the following

- [X] I have searched [existing issues](https://github.com/cryptomator/cryptomator/issues?q=) for duplicates
- [X] I agree to follow this project's [Code of Conduct](https://github.com/cryptomator/cryptomator/blob/develop/.github/CODE_OF_CONDUCT.md)

### Summary

A request for shortcut file/icon to access immediately vault password enter with opening Cryptomator app

### Motivation

Everybody.

Everybody who uses this software should find it hassle-free experience when accessing the vault password login dialog without opening the Cryptomator app to select vault manually.

this is to reduce time accessing the vault you want to access.

### Considered Alternatives

With the help of developers who make Cryptomator awesome & free!!!

### Anything else?

There should be a shortcut file or icon for each vault to access it directly (vault password log in dialog) without opening the Cryptomator app.

this is to reduce time when accessing the vault you want

No files, tests, or entry points are named in the issue. Begin by identifying how vault selection and the password login dialog are launched, then determine the supported desktop shortcut or icon mechanisms for Windows, macOS, and Linux. Done means each vault can provide a direct shortcut to its password login dialog without manually selecting it in the app.

Written by the indexing model from the issue text.