style(install-banner): use monospace font and px sizing for buttons

Change install banner button typography to match site aesthetic:

- Install/Dismiss buttons: 14px IBM VGA 9x16 monospace

- Removes experimental pixel art wizard character

Also fixes title/subtitle font sizes to match resource items

Author: xnoto

makeitwork.cloud/index.html

@@ -492,8 +492,8 @@
         color: var(--bg-dark);
         border: none;
         padding: 0.5rem 1rem;
-        font-family: inherit;
-        font-size: 0.9rem;
+        font-family: "IBM VGA 9x16", monospace;
+        font-size: 14px;
         font-weight: 600;
         cursor: pointer;
         transition: all 0.2s ease;
@@ -508,8 +508,8 @@
         color: var(--text-dim);
         border: 1px solid var(--border-dim);
         padding: 0.5rem 0.75rem;
-        font-family: inherit;
-        font-size: 0.9rem;
+        font-family: "IBM VGA 9x16", monospace;
+        font-size: 14px;
         cursor: pointer;
         transition: all 0.2s ease;
       }