GitHub App migration page: put migrate all first (#605)

If a user has lots of projects, it's hard to see this option without
having to scroll all the way down. But looks weird having this big
section before the listing, maybe something like having a "migrate all"
link to the actual section is better?

![Screenshot 2025-05-29 at 12-23-48 Migrate account to GitHub App - Read
the Docs
Dev](https://github.com/user-attachments/assets/fd683aaf-ef01-4000-b960-41dda8461a98)

---------

Co-authored-by: Manuel Kaufmann <humitos@gmail.com>

Author: stsewd

readthedocsext/theme/templates/profiles/private/migrate_to_gh_app.html

@@ -188,15 +188,12 @@ <h2 class="ui medium dividing header">
                 {% endblocktrans %}
               </p>
 
-              {% include "profiles/partials/github_app_project_list.html" with objects=migration_targets skip_pagination=True %}
-
               {% if migration_targets %}
                 <div class="ui segment">
                   <h3 class="ui small header">{% trans "Migrate all projects" %}</h3>
                   <p>
                     {% blocktrans trimmed %}
-                      You can also migrate all projects at once if you don't need to manually review migration for each project.
-                      Note that projects with warnings will not be migrated.
+                      You might need to take additional steps for some projects that can't be migrated automatically.
                     {% endblocktrans %}
                   </p>
 
@@ -209,6 +206,8 @@ <h3 class="ui small header">{% trans "Migrate all projects" %}</h3>
                 </div>
               {% endif %}
 
+              {% include "profiles/partials/github_app_project_list.html" with objects=migration_targets skip_pagination=True %}
+
               <div class="ui medium header">{% trans "Projects already migrated" %}</div>
 
               {% include "profiles/partials/github_app_project_migrated_list.html" with objects=migrated_projects skip_pagination=True %}