Add howto/GI index page

Author: Renae Metcalf

docs/howto/gathering_info/index.md

@@ -0,0 +1,13 @@
+# Gathering Information
+
+For some decision points, we offer additional guidance on how to gather information about some decision points so that you can determine the corresponding decision values.
+
+!!! note
+    As a reminder, while we encourage stakeholders to customize end priority labels, we discourage modifying the provided decision points.
+
+- [Automatable](automatable.md)
+- [Exploitation](exploitation.md)
+- [Mission Impact](mission_impact.md)
+- [System Exposure](system_exposure.md)
+- [Technical Impact](technical_impact.md)
+- [Value Density](value_density.md)

mkdocs.yml

@@ -8,7 +8,8 @@ nav:
   - SSVC Overview: 'ssvc_overview.md'
   - SSVC How-To:
     - Overview: 'howto/index.md'
-    - Gathering Info about Decision Points:
+    - Gathering Info about Decision Points: 
+      - Intro: howto/gathering_info/index.md
       - Automatable: howto/gathering_info/automatable.md
       - Exploitation: howto/gathering_info/exploitation.md
       - Mission Impact: howto/gathering_info/mission_impact.md