docs: add contribution section (#744)

docs/contribution/dev.mdx

@@ -42,7 +42,6 @@ embedchain is built on the following stack:
 ### Maintainer
 
 - Deshraj Yadav ([@deshrajdry](https://twitter.com/taranjeetio))
-- [cachho](https://github.com/cachho)
 
 ### Citation
 

docs/contribution/guidelines.mdx

@@ -0,0 +1,4 @@
+---
+title: '📝 Guidelines'
+url: https://github.com/embedchain/embedchain/blob/main/CONTRIBUTING.md
+---

docs/contribution/javascript.mdx

@@ -0,0 +1,4 @@
+---
+title: '📝 Javascript'
+url: https://github.com/embedchain/embedchain/tree/main/embedchain-js
+---

docs/contribution/python.mdx

@@ -0,0 +1,4 @@
+---
+title: '📝 Python'
+url: https://github.com/embedchain/embedchain
+---

docs/mint.json

@@ -79,8 +79,14 @@
       "pages": ["integration/langsmith"]
     },
     {
-      "group": "Contribution Guidelines",
-      "pages": ["contribution/dev", "contribution/docs"]
+      "group": "Contribute",
+      "pages": [
+        "contribution/guidelines",
+        "contribution/dev",
+        "contribution/docs",
+        "contribution/python",
+        "contribution/javascript"
+      ]
     }
 
   ],