Support dynamically adding single-dictionary anki card in the popup

[jamesmaa]

iiuc yomitan only has two buttons to add to Anki, one for expression and one for reading. This is quite confusing for non-Japanese learners who don't really have a differentiation between the two and could really get by with just one button.

Similarly there might be folks who want the flexibility to add to Anki different types of notes depending on the context. If we added an interface that allowed users to customize the number of "Add to Anki" buttons, this would improve the user experience

[StefanVukovic99]

Can probably close #64 now that we have this one

[jamesmaa]

I'm thinking about tackling this task next. Here's how I'm thinking about approaching/implementing it:

In the anki settings modal, add a sub tab area underneath "Terms" with two prepopulated anki profiles "Expression" and "Reading" with a "+" button to add an extra profile.

On the bottom of each profile, add a "Delete anki profile" button.

Really bad mockup

On yomitan popup, load all the profiles and have one button for each profile.

This might require moving the duplicate checking option into each anki profile