improve typescript and linting usage across codebase

add ts-lit-plugin and eslint-typescript

disable no-invalid-css rule

fix a bunch of errors raised by eslint and typescript

run prettier & eslint on the remaining files

remove unused imports

split coll-index into index and info components...
and rename "coll" -> "item" for these.
also includes some fixes for previously-undocumented properties used on
non-ts elements.

extract labeled fields into separate component...
and make a few type improvements too

swap custom copy button for shoelace one

rename a few more missed things

assets/main.scss

@@ -119,9 +119,7 @@ a:focus {
   font-size: $body-size;
   -moz-osx-font-smoothing: grayscale;
   -webkit-font-smoothing: antialiased;
-  min-width: $body-min-width;
-  overflow-x: $body-overflow-x;
-  overflow-y: $body-overflow-y;
+  min-width: $body-min-width; // @todo(emma, 2023-11-06) investigate why this is here
   text-rendering: $body-rendering;
   text-size-adjust: 100%;
 
@@ -132,7 +130,6 @@ a:focus {
   line-height: $body-line-height;
 
   box-sizing: border-box;
-  overflow: hidden;
 }
 
 // Make available to screen readers while hiding element visually:
@@ -146,4 +143,4 @@ a:focus {
   clip: rect(0, 0, 0, 0);
   white-space: nowrap;
   border-width: 0;
-}
+}