chore(charts): use the Sim favicon, matching sim.ai and docs.sim.ai

The page pointed at a raw.githubusercontent URL for the old primary logo,
which is neither the icon the other Sim sites serve nor something that
should be fetched cross-origin on every load.

Copies icon.svg and the 16/32/apple-touch PNGs out of apps/docs/public and
serves them from this branch under the same paths sim.ai and docs.sim.ai
use, so the tab icon is identical across all three and the page has no
external asset dependency.

Skips the android-chrome and web-app-manifest sizes: those exist for
installable PWAs via site.webmanifest, which a chart repository is not.

Author: waleedlatif1

favicon/apple-touch-icon.png

@@ -5,7 +5,10 @@
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <title>Sim Helm charts</title>
 <meta name="description" content="Helm chart repository for Sim, the open-source AI workspace where teams build, deploy, and manage AI agents.">
-<link rel="icon" href="https://raw.githubusercontent.com/simstudioai/sim/main/apps/sim/public/logo/primary/primary.svg">
+<link rel="icon" href="/icon.svg" type="image/svg+xml" sizes="any">
+<link rel="icon" href="/favicon/favicon-32x32.png" sizes="32x32" type="image/png">
+<link rel="icon" href="/favicon/favicon-16x16.png" sizes="16x16" type="image/png">
+<link rel="apple-touch-icon" href="/favicon/apple-touch-icon.png">
 <style>
   /*
    * Tokens copied from apps/sim/app/_styles/globals.css (the `:root, .light`