feat: grade exercise with AI (#296)

* working on the UI of the grading

* working on the grading function of the radio and checkboxes

* ai grading fully implemented with dummy functions for generating scores

* working on the openai response

* working on the openai response

* finished with the ai_grading

* finished with the ai_grading

* creating new migration file

* working on reviews

* updated the translations

* improvements

---------

Co-authored-by: Rotimi Best <best@classroomio.com>

packages/shared/src/plans/data.json

@@ -13,7 +13,7 @@
       "Unlimited Q/A",
       "50 Students",
       "AI Course Builder (no video upload)",
-      "Live chat & polls"
+      "ClassroomIO branding"
     ],
     "CTA": {
       "LABEL": "Signup Now",
@@ -37,7 +37,7 @@
       "Unlimted Teachers",
       "10K Students",
       "Advanced AI Course Builder (Video upload & Certificate)",
-      "No ClassroomIO Branding",
+      "Custom Branding",
       "Slack Invite",
       "Includes all Upcoming Features"
     ],