chore: Remove developing/introduction page and make Local Development the landing page (calcom#27492)

* Update docs/mint.json

Co-Authored-By: mintlify[bot] <109931778+mintlify[bot]@users.noreply.github.com>

* Delete docs/developing/introduction.mdx

Co-Authored-By: mintlify[bot] <109931778+mintlify[bot]@users.noreply.github.com>

* Add redirects for developing introduction

Added redirects for the developing introduction page.

* Delete docs/mint.json

* Add redirects for developing introduction page

* Remove introduction page from Getting Started group

---------

Co-authored-by: mintlify[bot] <109931778+mintlify[bot]@users.noreply.github.com>
Co-authored-by: Syed Ali Shahbaz <52925846+alishaz-polymath@users.noreply.github.com>

Author: mintlify[bot]

docs/developing/introduction.mdx

@@ -7,6 +7,12 @@
     "light": "#d6d6d6",
     "dark": "#111827"
   },
+  "redirects": [
+    {
+      "source": "/developing/introduction",
+      "destination": "/developing"
+    }
+  ],
   "favicon": "/favicon.png",
   "navigation": {
     "tabs": [
@@ -33,7 +39,6 @@
           {
             "group": "Getting Started",
             "pages": [
-              "developing/introduction",
               "developing/local-development"
             ]
           },
@@ -252,4 +257,4 @@
       "linkedin": "https://www.linkedin.com/company/cal-com"
     }
   }
-}
+}