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

tsconfig.json

@@ -14,9 +14,24 @@
     "inlineSources": true,
     "paths": {
       "flexsearch": ["./node_modules/@types/flexsearch"]
-    }
+    },
+    "plugins": [
+      {
+        "name": "ts-lit-plugin",
+        "strict": true,
+        "rules": {
+          // This seems to produce a bunch of false positives, so we've turned it off for now.
+          // Relevant issues:
+          // https://github.com/runem/lit-analyzer/issues/293
+          // https://github.com/runem/lit-analyzer/issues/302
+          // https://github.com/runem/lit-analyzer/issues/266
+          "no-missing-import": "off",
+
+          // ts-lit-plugin also doesn't seem to understand string interpolations in CSS, so this is also turned off.
+          "no-invalid-css": "off"
+        }
+      }
+    ]
   },
-  "include": [
-    "src/**/*.ts"
-  ]
-}
+  "include": ["src/**/*.ts"]
+}