Archive verification info + Embed improvements + Embed Receipts UI (#125)

info panel verification/integrity additions, (fixes on #113)
- info panel: display number of hashes verified valid (and invalid), observer domain (if any), and certificate fingerprint, creation software, and package digest
- info: ensure replayTS is updated, not just replayUrl, to ensure correct stats

404 page: improved formatting on 404 page (via wabac.js)

embeds:
- new embed 'replay-with-info mode, displays replay-only with dropdown showing archival 'receipt, which includes condensed info and verification (hashes valid/invalid, observer domain, cert fingerprint)
- support 'newWindowBase' attribute for specifying base replay URL for opening new window. default: use current url if deepLink enabled, otherwise use https://replayweb.page/
use transparent for embeds
- embed dropdown/receipt styling from @Shrinks99 
- automatically setting noCache and noWebWorker for older browsers (eg. safari < 16)
- add 'hideOffscreen' attribute to enable unloading embed when offscreen

dependencies: update to wabac.js 2.13.0-beta.0

bump version to 1.7.0-beta.0

Embed receipt styling co-authored-by: @Shrinks99

assets/chevron-double-down.svg

@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-chevron-double-down" viewBox="0 0 16 16">
+  <path fill-rule="evenodd" d="M1.646 6.646a.5.5 0 0 1 .708 0L8 12.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z"/>
+  <path fill-rule="evenodd" d="M1.646 2.646a.5.5 0 0 1 .708 0L8 8.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z"/>
+</svg>

assets/chevron-double-up.svg

@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-chevron-double-up" viewBox="0 0 16 16">
+  <path fill-rule="evenodd" d="M7.646 2.646a.5.5 0 0 1 .708 0l6 6a.5.5 0 0 1-.708.708L8 3.707 2.354 9.354a.5.5 0 1 1-.708-.708l6-6z"/>
+  <path fill-rule="evenodd" d="M7.646 6.646a.5.5 0 0 1 .708 0l6 6a.5.5 0 0 1-.708.708L8 7.707l-5.646 5.647a.5.5 0 0 1-.708-.708l6-6z"/>
+</svg>

assets/globe.svg

@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-globe" viewBox="0 0 16 16">
+  <path d="M0 8a8 8 0 1 1 16 0A8 8 0 0 1 0 8zm7.5-6.923c-.67.204-1.335.82-1.887 1.855A7.97 7.97 0 0 0 5.145 4H7.5V1.077zM4.09 4a9.267 9.267 0 0 1 .64-1.539 6.7 6.7 0 0 1 .597-.933A7.025 7.025 0 0 0 2.255 4H4.09zm-.582 3.5c.03-.877.138-1.718.312-2.5H1.674a6.958 6.958 0 0 0-.656 2.5h2.49zM4.847 5a12.5 12.5 0 0 0-.338 2.5H7.5V5H4.847zM8.5 5v2.5h2.99a12.495 12.495 0 0 0-.337-2.5H8.5zM4.51 8.5a12.5 12.5 0 0 0 .337 2.5H7.5V8.5H4.51zm3.99 0V11h2.653c.187-.765.306-1.608.338-2.5H8.5zM5.145 12c.138.386.295.744.468 1.068.552 1.035 1.218 1.65 1.887 1.855V12H5.145zm.182 2.472a6.696 6.696 0 0 1-.597-.933A9.268 9.268 0 0 1 4.09 12H2.255a7.024 7.024 0 0 0 3.072 2.472zM3.82 11a13.652 13.652 0 0 1-.312-2.5h-2.49c.062.89.291 1.733.656 2.5H3.82zm6.853 3.472A7.024 7.024 0 0 0 13.745 12H11.91a9.27 9.27 0 0 1-.64 1.539 6.688 6.688 0 0 1-.597.933zM8.5 12v2.923c.67-.204 1.335-.82 1.887-1.855.173-.324.33-.682.468-1.068H8.5zm3.68-1h2.146c.365-.767.594-1.61.656-2.5h-2.49a13.65 13.65 0 0 1-.312 2.5zm2.802-3.5a6.959 6.959 0 0 0-.656-2.5H12.18c.174.782.282 1.623.312 2.5h2.49zM11.27 2.461c.247.464.462.98.64 1.539h1.835a7.024 7.024 0 0 0-3.072-2.472c.218.284.418.598.597.933zM10.855 4a7.966 7.966 0 0 0-.468-1.068C9.835 1.897 9.17 1.282 8.5 1.077V4h2.355z"/>
+</svg>

assets/main.scss

@@ -113,7 +113,7 @@ a:focus {
 
 // Add html and body styles to :host for webcomponents
 :host {
-  background-color: $body-background-color;
+  //background-color: $body-background-color;
   font-size: $body-size;
   -moz-osx-font-smoothing: grayscale;
   -webkit-font-smoothing: antialiased;