[Feature Request]: Add import/export buttons to Data Settings for the missing databases

[efb4f5ff-1298-471a-8973-3d47447115dc]

Guidelines

• I have searched the issue tracker for open and closed issues that are similar to the feature request I want to file, without success.
• I have searched the documentation for information that matches the description of the feature request I want to file, without success.
• This issue contains only one feature request.

Problem Description

https://docs.freetubeapp.io/usage/data-location/#notable-files lists 6 database files. We only provide import/export for Subscriptions, Playlists and History. An user might want to import/export the other files.

Proposed Solution

Provide import/export buttons for settings.db, search-history.db and subscription-cache.db

Alternatives Considered

None.

Issue Labels

ease of use improvement

Additional Information

No response

[absidue]

Importing the settings.db will be problematic if we try to do it in a similar way to our existing imports, as we block writing certain settings from inside a window for security reasons, such as the default download and screenshots folders (we should probably do something similar for the external player settings at some point too).

[ArthurKun21]

wonder if it can be unified into single database file for import and export like

{
  "settings" : ...,
  "subscriptions": ...,
  "history": ...
}

while still able to make it individually exported and imported

{
  "settings" : ...,
}

{
  "subscriptions": ...,
}

{
  "history": ...
}