Feature #111: Translation History

[0x6362]

@artemave: Tried to keep this in the style of the existing code and refactor as little as possible, very much an MVP of the functionality to get your feedback

RE: storage and export. Went with JSON instead of CSV, which possibly less accessible to users by default. Happy to create a setting to support export in either.

Other call out is the addition of the dexie dependency. I would prefer not to implement code for handling IndexedDB migrations/schema changes myself, but I've done it before and can do it here if you would prefer not to add a dep.

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• Adds Setting, defaulting to "On", enabling recording/logging of translated words for later export, e.g. to convert into Anki cards
• Adds button to the TransOver Popup Window to save history of translated words

TODO

• Test in Chrome
• Test in browsers still using v2 Manifest?

[artemave]

RE: storage and export. Went with JSON instead of CSV, which possibly less accessible to users by default. Happy to create a setting to support export in either.

Probably best to add CSV as a follow up pr.

[artemave]

Other call out is the addition of the dexie dependency

Adding dexie seems reasonable to me.