Tidies webpack cli output

- Uses html-loader partials (removes ejs)
 - Updates select styling

Helps avoid source map conflicts with other extensions

Changes heatmap colorization for better clarity
Changes blame avatars to be w/ the annotations rather than in the gutter

Updates dependencies

Hoping to reduce strange issues with watch

Because of missing type='text'

Switches to use fork-ts-checker

Splits App into AppBase & AppWithConfigBase for impl of new webviews

Adds bundle analyzer
Adds circular deps analyzer
Switches to es2018 output
Removes many circular dependencies