feat: adding link to dashboard (#269)

### TL;DR

Added a Dashboard navigation link and changed the default theme mode from light to dark in the documentation configuration.

### What changed?

- Added a new "Dashboard" navigation item linking to `https://app.lightspark.com/login`
- Changed the default mode toggle setting from "light" to "dark"

### How to test?

1. Load the documentation site and verify the new "Dashboard" link appears in the navigation
2. Confirm the "Dashboard" link redirects to `https://app.lightspark.com/login`
3. Check that the documentation loads with dark mode as the default theme

### Why make this change?

This improves user experience by providing direct access to the dashboard from the documentation and sets dark mode as the default theme preference.

Author: pengying

.gitignore

@@ -54,3 +54,6 @@ TODO-*.md
 
 # Icon build script (local tool, requires license key)
 scripts/export-icons.js
+
+# Superset
+.superset/

mintlify/docs.json

@@ -290,11 +290,15 @@
       {
         "label": "Contact sales",
         "href": "https://www.lightspark.com/contact"
+      },
+      {
+        "label": "Dashboard",
+        "href": "https://app.lightspark.com/login"
       }
     ]
   },
   "modeToggle": {
-    "default": "light",
+    "default": "dark",
     "isHidden": false
   },
   "contextual": {

sdks/grid-kotlin

@@ -0,0 +1 @@
+Subproject commit 094fd99ba0c041ecf5288d9f3da655a02b057766

sdks/grid-typescript

@@ -0,0 +1 @@
+Subproject commit 60145f927648acd87cdb77b79ffcfc3c1c9eebbe