CBL Import (#1834)

* Wrote my own step tracker and added a prev button. Works up to first conflict flow.

* Everything but final import is hooked up in the UI. Polish still needed, but getting there.

* Making more progress in the CBL import flow.

* Ready for the last step

* Cleaned up some logic to prepare for the last step and reset

* Users like order to be starting at 1

* Fixed a few bugs around cbl import

* CBL import is ready for some basic testing

* Added a reading list hook on side nav

* Fixed up unit tests

* Added icons and color to the import flow

* Tweaked some phrasing

* Hooked up a loading variable but disabled the component as it didn't look good.

* Styling it up

* changed an icon to better fit

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Co-authored-by: Robbie Davis <robbie@therobbiedavis.com>

UI/Web/src/_manga-reader-common.scss

@@ -90,4 +90,4 @@ img {
       0px 0px calc(0.5px*3.14) 0.3px rgb(0 0 0 / 43%),
       0px 0px 1px 0.5px rgb(0 0 0 / 43%);
   }
-}
+}