Added paste image support

[tobias-kuendig]

Description

This PR introduces support to paste images. It utilizes the arboard crate to fetch image data from the clipboard, then provides it as a base64 encoded string to the frontend using a Tauri command.

This PR depends on https://github.com/cinnyapp/cinny/pull/1238

Fixes https://github.com/cinnyapp/cinny-desktop/issues/69

Tested on Ubuntu 22.04 LTS on Wayland.

Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [X] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

Checklist:

• [X] My code follows the style guidelines of this project
• [X] I have performed a self-review of my own code
• [X] I have commented my code, particularly in hard-to-understand areas
• [X] I have made corresponding changes to the documentation
• [X] My changes generate no new warnings

[github-actions[bot]]

CLA Assistant Lite bot All contributors have signed the CLA ✍️ ✅

[tobias-kuendig]

I have read the CLA Document and I hereby sign the CLA

[ghost]

When will it be merged? Are there any blockers?

[b1ek]

When will it be merged? Are there any blockers?

+1 on this. @kfiven @ajbura can you take a look?

[knedl1k]

Any update?