Transfer Experience Endpoints to Identities Scope and update the data structure for requests and responses

[sanaderi]

Move experience-related endpoints to the identities scope and update the data structure for requests and responses.

Changes Required

Request Change

Instead of receiving a title, the experience request should now receive a school_id.

Response Change

The experiences response should now return the school_title.

Acceptance Criteria

• All experience endpoints are moved under identities scope
• Experience creation/update uses school_id instead of title
• Experience response includes school_title
• Existing functionality remains intact

[farsica]

Since Experience is an independent entity, its management section is separated. The profile-related sections are located within Identity endpoints (get user profile and public profile)

[sanaderi]

Thanks for #432
Experience submission always return

{
  "data": {
    "id": 0
  },
  "succeeded": false,
  "errors": [
    {
      "message": "Maximum length exceeded",
      "code": null,
      "reference": null,
      "info": null,
      "value": null
    }
  ]
}