Feature: Display error message when settings file isn't valid

[yaira2]

If the json file isn't valid, we should notify the user of the issue.

Requirements

• Display modal if the settings file isn't valid with a description of the issue
• Include button to reset settings
• Include button to close app

[tsvietOK]

As i told in #562 we should unify all exceptions(replace JsonSerializationException with Exception or add JsonReaderException), so if there will be any json parsing error, just reset this json to default.

[FelixZacher]

But if we reset the json file, the user loses all his profiles and we will have to store a default json file. If the terminal loading process goes wrong for whatever reason, i would simply default to cmd and log, that there was an error. So the user can investigate his json file, if he want's to fix it and if not, he gets the cmd terminal.

[yaira2]

That would be a nice addition, however it would still make sense to include a json file for someone who wants to use the json format.

[FelixZacher]

Maybe we should get rid of the json file, especially if we auto-detect the common terminals (powershell (core), WindowsTerminal).

And for the few users, who want's to use a custom one, they can choose custom and then we present them an input box to specify the path.

I choosed json, because i thought then they can specify multiple terminals and icons and so on, but i don't think we will use that customization.
If a user want's control over multiple terminal, he will install Windows Terminal or terminus, ...

[yaira2]

Maybe we should get rid of the json file, especially if we auto-detect the common terminals (powershell (core), WindowsTerminal).

And for the few users, who want's to use a custom one, they can choose custom and then we present them an input box to specify the path.

I choosed json, because i thought then they can specify multiple terminals and icons and so on, but i don't think we will use that customization. If a user want's control over multiple terminal, he will install Windows Terminal or terminus, ...

@lampenlampen that is a possibility, and once support is added for importing and exporting the settings json file, users can technically add a custom terminal path even it's not detected automatically by Files.