style: add full Pygments token colors for code samples

Add CSS rules for all Pygments token classes used in the homepage
code samples: keywords, builtins, function names, strings, numbers,
operators, comments, output, and prompts. Uses a dark-background
color scheme consistent with the existing slide-code styling.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: JacobCoffee

static/sass/style.css

@@ -1529,13 +1529,31 @@ input#s,
   .slide-code code {
     display: inline-block;
     color: #0d870d; }
+    .slide-code code .k,
+    .slide-code code .ow {
+      color: #6ab825;
+      font-weight: bold; }
+    .slide-code code .nb {
+      color: #24909d; }
+    .slide-code code .nf {
+      color: #447fcf; }
+    .slide-code code .s1,
+    .slide-code code .s2,
+    .slide-code code .sa,
+    .slide-code code .si {
+      color: #ed9d13; }
+    .slide-code code .mi {
+      color: #3677a9; }
+    .slide-code code .o {
+      color: #999999; }
     .slide-code code .c1 {
-      color: #666666;
-      font-style: normal; }
+      color: #999999;
+      font-style: italic; }
     .slide-code code .go {
-      color: #dddddd; }
+      color: #cccccc; }
     .slide-code code .gp {
-      color: #c65d09; }
+      color: #c65d09;
+      font-weight: bold; }
 
 .js .launch-shell, .no-js .launch-shell {
   display: none; }