[Documentation:InstructorUI] Upload JSON to create gradeable (#576)

This PR adds documentation on how to use the feature added in
Submitty/Submitty#10100.

_docs/instructor/assignment_preparation/index.md

@@ -10,8 +10,8 @@ redirect_from:
 ### Create a New Gradeable
 
 To create a new gradeable, instructor users should click "New
-Gradeable" in the sidebar on the left of the screen. 
-Fill out this form (details in the following sections) and press "Create New Gradeable".
+Gradeable" in the sidebar on the left of the screen. Either [Upload a JSON file](/instructor/assignment_preparation/upload_gradeable), or
+fill out this form (details in the following sections) and press "Create New Gradeable".
 
 Most of the fields on the Create/Edit Gradeable form can be changed
 later.  You can return to this form from the main page by pressing the

_docs/instructor/assignment_preparation/upload_gradeable.md

@@ -0,0 +1,113 @@
+---
+category: Instructor > Assignment Preparation
+title: Upload Gradeable
+redirect_from:
+  - /instructor/assignment_preparation/upload_gradeable
+---
+To create a gradeable by uploading a JSON file, click the "Upload Gradeable Json" file in the top right. 
+
+Upload and submit the JSON file to the popup window. If the JSON file contains all of the correct information, you will be
+redirected to the gradeable edit screen. 
+## Variables
+#### __Required__
+* title -- Gradeable title 
+* type -- "Checkpoints", "Numeric", or "Electronic File"
+* id -- Gradeable ID (Must be unique)
+
+#### Electronic File
+__VCS__
+* repository_type -- "submitty-hosted", "submitty-hosted-url", "public-github", "self-hosted", "private-github" (Required)
+* vcs_path -- Path to VCS repositories (Can be URL, Required)
+* vcs_subdirectory -- Path to files within the repository (Optional, leave out if not using subdirectories)
+
+```json
+"vcs": {
+  "repository_type": "submitty-hosted",
+  "vcs_path": "http://localhost:1511/path/to/repository",
+  "vcs_subdirectory": "subdirectory"
+}
+```
+
+__Other Electronic Types__
+* bulk_upload -- If the TA will bilk upload assignments online (Default false)
+* normal -- Do not include bulk_upload or vcs to have a normal student upload gradeable.
+
+#### Other Variables
+
+#### Team assignments
+ * team_size_max: Maximum team size
+ * inherit_from: Gradeable ID to inherit teams from (Default none)
+
+```json
+"team_gradeable": {
+    "team_size_max": 3,
+    "inherit_from": "gradeable_id",
+}
+```
+#### Grade inquiries
+```json
+"grading_inquiry": {
+  "grade_inquiry_per_component_allowed": false,
+}
+```
+#### Other
+* ta_grading -- If the TA will grade any/all of the assignments (Default false)
+* discussion_thread_id -- The thread ID if using forums (Default none)
+* syllabus_bucket -- (Default "Homework")
+#### All variables
+```json
+{
+  "title": "Example Json",
+  "instructions_url": "",
+  "id": "hw-1",
+  "type": "Electronic File",
+  "vcs": {
+    "repository_type": "submitty-hosted",
+    "vcs_path": "http://localhost:1511/path/to/repository",
+    "vcs_subdirectory": "subdirectory"
+  },
+  "team_gradeable": {
+    "team_size_max": 3,
+    "inherit_from": "gradeable_id",
+  },
+  "bulk_upload": false,
+  "grading_inquiry": {
+    "grade_inquiry_per_component_allowed": false
+  },
+  "ta_grading": false,
+  "discussion_thread_id": "thread_id",
+  "syllabus_bucket": "Homework"
+}
+```
+#### Sample Bulk Upload Template
+```json
+{
+  "title": "Testing Json",
+  "id": "hw-bulk-upload",
+  "type": "Electronic File",
+  "bulk_upload": true,
+  "syllabus_bucket": "Homework"
+}
+```
+#### Sample Checkpoints Template
+```json
+{
+  "title": "Checkpoints Gradeable",
+  "id": "hw-checkpoints",
+  "type": "Checkpoints",
+  "syllabus_bucket": "Homework"
+}
+```
+#### Sample VCS Template
+```json
+{
+  "title": "VCS Gradeable",
+  "id": "hw-vcs",
+  "type": "Electronic File",
+  "syllabus_bucket": "Homework",
+  "vcs": {
+    "repository_type": "submitty-hosted",
+    "vcs_path": "http://localhost:1511/path/to/repository",
+    "vcs_subdirectory": "subdirectory"
+  },
+}