docs: Add comprehensive OAuth authorization setup guide to Jira integration

docs/integrations/jira.mdx

@@ -40,6 +40,54 @@ Follow these steps to successfully connect Codegen to your Jira workspace:
   Make sure you are logged in as the Codegen Jira user when authorizing access. This is to ensure Codegen acts on behalf of the new user and not your personal account.
 </Warning>
 
+## Setup & Authorization
+
+When connecting Codegen to your Jira workspace, you may encounter an authorization screen from Atlassian that requires additional setup. Here's what to expect and how to resolve common authorization issues:
+
+### OAuth Authorization Process
+
+During the OAuth flow, Atlassian will display an authorization screen showing:
+
+1. **App Information**: Details about Codegen requesting access to your Jira account
+2. **Permissions Requested**: A list of specific permissions Codegen needs (see below)
+3. **Authorization Options**: Buttons to approve or deny access
+
+### Site Admin Authorization Requirement
+
+**Common Issue**: You may see a message stating that a site administrator needs to authorize Codegen before you can proceed.
+
+**Resolution Steps**:
+1. **Contact Your Jira Administrator**: Reach out to your Jira site administrator and ask them to:
+   - Log in to your Jira instance as an administrator
+   - Navigate to the same OAuth authorization URL
+   - Review and approve Codegen's access request
+
+2. **Administrator Approval Process**: Your admin will see the same authorization screen and can approve Codegen for your entire organization
+
+3. **Retry Authorization**: Once your administrator has approved Codegen, return to the authorization flow and complete the process
+
+### Permissions Requested by Codegen
+
+Codegen requests the following permissions from your Jira workspace:
+
+- **`jira-webhook`**: Allows Codegen to receive notifications about issue updates, comments, and status changes
+- **`jira-user`**: Enables Codegen to read user information and perform actions on behalf of the authorized user
+- **`jira-work`**: Grants access to read and write issue data, including creating, updating, and commenting on issues
+
+### Privacy & Data Access
+
+**What Codegen Can Access**:
+- Issue details, comments, and status information
+- Project information and team member lists
+- User profile information for the authorized account
+
+**What Codegen Cannot Access**:
+- Personal information beyond what's necessary for Jira integration
+- Data from other Atlassian products unless explicitly authorized
+- Administrative settings or sensitive configuration data
+
+**Data Usage**: Codegen only uses this data to perform the specific actions you request, such as updating issue status, adding comments, or linking GitHub PRs to Jira issues.
+
 ### 4. Switch Back to Your Own Jira Account
 - After connecting, log out of the Codegen Jira user in Jira.
 - Log back in with your personal Jira account.
@@ -63,4 +111,3 @@ Agents use the Jira integration to streamline project management:
 - **Link Code:** Connect implemented changes (GitHub PRs) directly to the relevant Jira issue.
 - **Provide Updates:** Post comments on issues with progress reports, results, or questions.
 - **Create Tasks:** Generate new issues for follow-up work, bugs discovered, or sub-tasks.
-