Added JSON descriptions (#465)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Documentation**
  * Updated HTML documentation title display to "Codio Documentation"
* Added comprehensive documentation for Codio Guides structure,
including filesystem layout, JSON conventions, content item types, and
directory examples
* Added detailed documentation for authoring multiple-choice assessments
with JSON format specifications and schema requirements
  * Improved documentation formatting in existing guides

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: jairovelasquez

source/conf.py

@@ -261,7 +261,7 @@
 
 # html_logo = "_static/logo-white.svg"
 html_logo = None
-html_title = "Codio"
+html_title = "Codio Documentation"
 html_favicon = "_static/favicon.ico"
 html_extra_path = ['robots.txt']
 html_permalinks_icon = Icons.permalinks_icon

source/instructors/authoring/assessments/student-submission.rst

@@ -14,7 +14,7 @@ The Submit Button
 --------------------
 By default each assessment has a Submit button beneath the assessment. Once pressed, the answer is autograded. 
 
-.. note:: You can customize the Submit button label to any text you prefer. In the assessment markdown, update the text to the left of "|assessment".
+.. note:: You can customize the Submit button label to any text you prefer. In the assessment markdown, update the text to the left of `|assessment`.
 
     .. image:: /img/guides/customizeSubmitbutton.png
        :alt: Customize Submit Button