Link fix (#11368)

* fixes logo

* cleans up homepage on docs

* adds icon files and tightens margins

* cleans up sidenav, adds top nav items

* fixes a link

* removes icon files

Co-authored-by: Dan Albert <dan@solana.com>

docs/src/history.md

@@ -1,5 +1,5 @@
 ---
-title: History of the Solana Codebase
+title: History
 ---
 
 In November of 2017, Anatoly Yakovenko published a whitepaper describing Proof

docs/src/pages/index.js

@@ -13,13 +13,13 @@ const features = [
     description: <>Get started building your decentralized app or marketplace.</>,
   },
   {
-    title: <>✅ Run a Validator Node</>,
+    title: <>🎛 Run a Validator Node</>,
     imageUrl: "running-validator",
     description: <>Validate transactions, secure the network, and earn rewards.</>,
   },
   {
     title: <>🏛 Create an SPL Token</>,
-    imageUrl: "tour-de-sol",
+    imageUrl: "https://spl.solana.com/token",
     description: (
       <>
         Launch your own SPL Token, Solana's equivalent of ERC-20.