[Documentation:Submission] No-file rubric grading (#743)

Added documentation page for the Submit All with Placeholder feature
instructors have access to on Bulk Upload type gradeables. This feature
is being added in PR #12576 in the Submitty site.
Submitty/Submitty#12576 

Screenshot:
<img width="1918" height="916" alt="image"
src="https://github.com/user-attachments/assets/e53739fd-41b5-4913-9617-ec7f8045a387"
/>

---------

Co-authored-by: Barb Cutler <bmcutler@users.noreply.github.com>

Author: roye2

_docs/instructor/assignment_preparation/no_file_rubric_grading.md

@@ -0,0 +1,48 @@
+---
+category: Instructor > Assignment Preparation
+title: No File Rubric Grading
+redirect_from:
+  - /instructor/no_file_rubric_grading
+---
+
+The **No File Rubric Grading** feature is a utility within the Bulk Upload instructor submission interface. It allows instructors to automatically submit an empty "placeholder" pdf submission for **every** active student on a specific gradeable. 
+
+An example of when this would be useful is for an assignment (like a presentation) where students do not have anything to submit to Submitty, but the instructor still wishes to grade them through Submitty.
+
+In this case, an instructor can use the **No File Rubric Grading** feature to enable rubric grading for all students. 
+
+---
+
+## How to Use this Feature
+
+1. **Create the Gradeable:** Ensure your gradeable is set to the 
+   type: *"TA/Instructor will (bulk) upload scanned .pdf"*.
+   
+2. **Access the Submission Page:** Navigate to the gradeables page and click the 
+   **Bulk Upload** tab.
+
+3. **Click "No File Rubric Grading":** This button is located 
+   near the top of the Bulk Upload section alongside the other submission modes.
+
+4. **Click "Submit Placeholder for Every Student":** This will actually submit the pdf
+   placeholders for every student on the gradeable. After confirming, a message will appear at the top of the screen displaying the successful number of submissions made.  
+   ![](/images/instructor/assignment_preparation/no_file_rubric_grading.png){:width="800px"}
+
+**Important:** This action **will** create 
+a new submission for all students on the gradeable. It will appear as the student's
+active version within the grading view and on the database. It will not erase any 
+previous submissions.
+
+---
+
+## Grading
+
+Once the submissions have been processed, they can be graded like any other student submission. They will be listed as a new version under the student's version status. Further uses of the function (while uneccessary) will simply increment the version number.
+
+---
+
+## Troubleshooting
+
+Ensure you are logged in as an Instructor level user.  
+Full grading access is required to use this feature. 
+There is currently no Team gradeable functionality for this feature. 

images/instructor/assignment_preparation/no_file_rubric_grading.png

@@ -114,6 +114,7 @@ var NAVTREE =
                 [ "Submissions via Version Control", "/instructor/assignment_preparation/submission_version_control", null ],
                 [ "Team Assignments", "/instructor/assignment_preparation/team_assignments", null ],
                 [ "Bulk PDF Upload", "/instructor/assignment_preparation/bulk_pdf_upload", null ],
+                [ "No File Rubric Grading", "/instructor/assignment_preparation/no_file_rubric_grading", null],
                 [ "Personalized Exam", "/instructor/assignment_preparation/personalized_exams", null ],
                 [ "Upload Gradeable from JSON", "/instructor/assignment_preparation/upload_gradeable", null ],
             ] ],