fix: redirects main site (#314)

# Description

Redirects for links with no "/" at the end and different extensions.

## Linked Issues

N/A - fixes links from zksync.io footer

## Additional context

firebase.json

@@ -86,6 +86,16 @@
         "destination": "/build/developer-reference/protocol",
         "type": 301
       },
+      {
+        "source": "/sdk:ext(.html|.md|)*",
+        "destination": "/zksync-era/sdk",
+        "type": 301
+      },
+      {
+        "source": "/sdk/:path*",
+        "destination": "/zksync-era/sdk/:path",
+        "type": 301
+      },
       {
         "source": "/sdk/:path*",
         "destination": "https://docs.zksync.io/zksync-era/sdk/:path",
@@ -211,6 +221,16 @@
         "destination": "/zksync-era/tooling/hardhat/plugins/other-plugins",
         "type": 301
       },
+      {
+        "source": "/ecosystem:ext(.html|.md|)*",
+        "destination": "/zksync-era/ecosystem",
+        "type": 301
+      },
+      {
+        "source": "/ecosystem/:path*",
+        "destination": "/new-destination",
+        "type": 301
+      },
       {
         "source": "/build/tooling/bridges.html",
         "destination": "/zksync-era/ecosystem/bridges",