Add Polkadot tab in UI, add download Hardhat Polkadot zip option (#680)

Co-authored-by: Cove Marquis-Bortoli <44323490+CoveMB@users.noreply.github.com>

Author: ericglau

.github/actions/setup/action.yml

@@ -5,7 +5,7 @@ runs:
   steps:
     - uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6.0.0
       with:
-        node-version: 20.x
+        node-version: 22
         cache: yarn
 
     - name: Install dependencies

.nvmrc

@@ -1 +1 @@
-20
+22