rename to 'rethink development', brighten lib table, drop stale note

- Rename site 'a rethink development' -> 'rethink development' (site_name,
  landing H1); copyright -> 'rethink development (handbook)'.
- libraries.md: remove the 'if the live list is empty' admonition now that
  Gitea CORS is fixed.
- extra.css: improve Library-column readability — brighter #cfe6ff code
  chips on a cyan-tinted bg, more weight, roomier cell padding (0.7/1em),
  nowrap lib names, accent-colored links.

Signed-off-by: disqualifier <dev@disqualifier.me>

docs/stylesheets/extra.css

@@ -166,9 +166,12 @@
 .rt-lib-table th,
 .rt-lib-table td {
   text-align: left;
-  padding: 0.55em 0.9em;
+  padding: 0.7em 1em;
   vertical-align: top;
 }
+.rt-lib-table td:first-child {
+  white-space: nowrap;
+}
 .rt-lib-table thead th {
   background-color: var(--rt-nav);
   color: var(--rt-text);
@@ -183,16 +186,19 @@
   background-color: rgba(86, 155, 204, 0.08);
 }
 .rt-lib-table td code {
-  background-color: var(--rt-surface);
-  color: var(--rt-primary-light);
-  padding: 0.1em 0.4em;
-  font-size: 0.85em;
+  background-color: rgba(85, 187, 255, 0.12);
+  color: #cfe6ff;
+  padding: 0.2em 0.55em;
+  font-size: 0.9em;
+  font-weight: 600;
 }
 .rt-lib-table a {
-  color: var(--rt-primary);
-}
-.rt-lib-table a:hover {
   color: var(--rt-accent);
+  font-weight: 600;
+}
+.rt-lib-table a:hover code {
+  background-color: rgba(85, 187, 255, 0.22);
+  color: #ffffff;
 }
 
 /* Language badge in the libs table. */