review: Add review workflow docs

Author: sakshamarora1

docs/review/images/change_community.png

@@ -1 +1,65 @@
 # Review process
+
+A review is the process by which a community evaluates a record before accepting it. When you submit a record to a community, a **submission request** is created. This request acts as a shared workspace between you and the community curators: both sides can exchange comments, request changes, and track the outcome — all without leaving CDS.
+
+![Request Page](./images/request_page.png)
+
+## Who takes part
+
+| Role | Who | What they can do |
+|---|---|---|
+| **Submitter** | The person who uploaded the record and submitted it to the community | Submit, edit the record during review, cancel the request, comment |
+| **Curator** | A community member with the Curator role or above | Accept or decline the request, comment, invite reviewers |
+| **Reviewer** | Any CDS user explicitly invited to the request by a curator | View the request and comment; cannot accept or decline |
+
+Curators can invite any CDS user as a reviewer on a specific submission, even if that person is not a community member. This is useful when specialist input is needed before a decision is made. See [Commenting](comments.md) for details on how to use the conversation features during a review.
+
+## Typical workflow
+
+### 1. Submission
+
+You can submit a record to a community in two ways:
+
+- **During upload**: Before publishing, select the community in the deposit form. The record will not be published until a curator accepts the submission.
+- **After publishing**: See [Submit to a community](../communities/submit.md#multiple-communities) for details.
+
+![Select Community](./images/select_community.png)
+![Change Community](./images/change_community.png)
+
+### 2. Review
+
+Once submitted, the request appears in the community's **Requests** tab, visible to all curators. The curators can:
+
+- Read the record and its metadata.
+- Leave comments or ask for changes (see [Commenting](comments.md)).
+- Invite additional reviewers.
+
+You will receive a notification if a curator leaves a comment. You can update the record's metadata and ask for a re-review by dropping a comment.
+
+!!! note
+
+    Both you and the curators can edit the record's metadata while it is under review. Files can still be updated before acceptance.
+
+### 3. Decision
+
+The curator will make one of two decisions:
+
+**Accepted**
+
+- If the record was not yet published, it is **published automatically** and added to the community.
+- If the record was already published, it is **added to the community** without any further action needed from you.
+
+**Declined**
+
+- The record is not added to the community. If it was not yet published, it remains as a draft and you can continue editing or publish it independently.
+- You cannot resubmit the same record to the same community after a decline. If you believe the decision was made in error, contact the community curators directly.
+
+### 4. After the review
+
+Once a request is closed (accepted or declined), the conversation is preserved and remains readable. If the conversation is locked, no further comments can be added. See [Locking the conversation](comments.md#locking-the-conversation) for details.
+
+If you want to remove an accepted record from a community at a later point, see [Removing from a community](../communities/submit.md#removing-from-a-community).
+
+## Cancelling a pending submission
+
+If you change your mind before a curator has made a decision, you can cancel the submission request. Open the request from the record's page and click **Cancel request**. The record is not affected; if it was not yet published, it remains as a draft.