Replace Strings with Localizable Resources

[qe201020335]

Using localizable resources allows others to properly localize the app without replacing string in a fork.

• [x] Extract and replace static strings in layout files
• [x] Extract and replace dynamic strings from code
• [x] Add an option to change language

I tried to put the new resource files in the Assets folder, but it didn't work, so I had to create a new folder for them.

[qe201020335]

~~I will squash the small commits later~~ Squashed

[qe201020335]

I think I have extracted all the strings. There could be some that I have missed

[Lauriethefish]

Heya, getting round to this now, sorry for the delay.

[Lauriethefish]

Currently attempting to find a workaround to refresh the UI without restarting the app. It seems changing theme does the trick but that's a bit too jank for my liking.

[Lauriethefish]

Seems there's no way to do it because StaticResources have no event handler because they're, well, static. We could make them dynamic resources but that would use more memory, so I think a restart is a good compromise for now.

[Lauriethefish]

Now lgtm, awaiting build