Merge Personal repo changes into ISARIC Research

[aidanmarler]

Over the past month or so, many changes were required for LINK, but the official ISARICResearch repo was not ready for live changes and testing.

Now that it is up, and some fixes have been finished in both repos, I have merged the two repositories.

Changes include:

1. Translation Memory
2. Composite Forward and Review form
3. Updated Home Page
4. CSS tweaks

[aidanmarler]

These changes were in response to comments and data from users.
The most substantive change is adding Translation Memory, or "Suggestions", as it is often referred to in the code and interface.
When writing a translation, suggestions may appear that come from querying the sql database with a custom function that batches queries checking for trigram similarity between segments.
This is supposed to make the translation process quicker, as it is a big ask and hurdle from our users.

The Composite form simply shows all states of a segment in one form, and then handles user input with respect to that. It was created to encourage reviews, make progress more obvious, and support any state of a translation.

The home page was updated to also make it simpler to just get started. It was also updated to show off progress and make a "lack of progress" not appear like a bad thing: rather, a goal to be achieved.

...

Finally, other fixes and tweaks were done, including an important on to how translation progress is calculated, a visual tweak to most buttons, and fixing a little logout bug.

[sr-murthy]

@aidanmarler I'll have a look, probably mid next week, now. Thanks.

[sr-murthy]

Can't comment in much detail as I'm not a TypeScript person, but I assume these work with the LINK app as currently deployed.