Open with external application

[axlEscalada]

• add functionality to open files with an external application

related to: #1343

[johnfactotum]

Thanks! Can you make it follow the project's coding style, 4 spaces and no semicolons?

[axlEscalada]

Thanks! Can you make it follow the project's coding style, 4 spaces and no semicolons?

It's done.
Btw I love foliate <3

[johnfactotum]

Thanks. The indentation is still incorrect, though. You can see this if you run npx eslint.

[axlEscalada]

Thanks. The indentation is still incorrect, though. You can see this if you run npx eslint.

thanks for the hint, I ran npx eslint --fix to fix the format