added docs about pephub organizations

docs/pephub/user/organization.md

@@ -0,0 +1,19 @@
+# PEPhub organizations
+
+PEPhub allows users to create and manage PEPs within an organization. PEPhub organizations are linked to GitHub 
+organizations, and all members of a linked GitHub organization are designated as admins for the projects in the 
+corresponding PEPhub organization. By default, all projects in a PEPhub organization are public. However, admins 
+can make projects private, restricting visibility to members of the organization.
+
+### Logging in
+When you log in to PEPhub through GitHub, all your organizations are fetched, and you are automatically added as an admin.
+
+!!! warning "Warning!"
+    PEPhub currently does not support GitHub user organizations that are set to private (hidden) in the user settings.
+
+!!! tip "Set GitHub org Membership Visibility"
+
+    1. Go to the GitHub page.
+    2. Navigate to the organization’s page. (e.g. https://github.com/databio)
+    3. Click People (in the organization's menu bar).
+    4. Locate your username and ensure your membership is public.![../img/github_orgs.png](../img/github_orgs.png)

mkdocs.yml

@@ -51,7 +51,7 @@ markdown_extensions:
       custom_fences:
         - name: mermaid
           class: mermaid
-          format: "!!python/name:pymdownx.superfences.fence_code_format"
+          format: !!python/name:pymdownx.superfences.fence_code_format
 
 extra_css:
   - stylesheets/extra.css
@@ -179,6 +179,7 @@ nav:
       - How to use views: pephub/user/views.md
       - PEP of PEPs (POP): pephub/user/pops.md
       - Accessing GEO metadata: pephub/user/geo.md
+      - PEPhub organization: pephub/user/organization.md
       - PEPHubClient:
         - PEPhubClient: pephub/user/pephubclient/README.md
         - Quickstart: pephub/user/pephubclient/tutorial.md