Add AI docs index (#876)

doc/how_to/index.md

@@ -2,6 +2,48 @@
 
 Lumen's How to Guides provide step by step recipes for solving essential problems and tasks. They are more advanced than the Getting Started material and assume some knowledge of how Lumen works.
 
+## Configuring Lumen AI
+
+::::{grid} 1 2 2 3
+:gutter: 1 1 1 2
+
+:::{grid-item-card} {octicon}`tools;2.5em;sd-mr-1` Custom Agents
+:link: ai_config/custom_agents
+:link-type: doc
+
+Learn how to create and configure custom agents to accomplish goals in Lumen AI.
+:::
+
+:::{grid-item-card} {octicon}`tasklist;2.5em;sd-mr-1` Custom Analyses
+:link: ai_config/custom_analyses
+:link-type: doc
+
+Discover how to implement and output custom views within Lumen AI.
+:::
+
+:::{grid-item-card} {octicon}`plug;2.5em;sd-mr-1` Custom Tools
+:link: ai_config/custom_tools
+:link-type: doc
+
+Explore how to develop and incorporate custom tools to provide additional context.
+:::
+
+:::{grid-item-card} {octicon}`comment-discussion;2.5em;sd-mr-1` Model Prompts
+:link: ai_config/model_prompts
+:link-type: doc
+
+Understand how to define and manage model-specific prompts for replacing response models.
+:::
+
+:::{grid-item-card} {octicon}`note;2.5em;sd-mr-1` Template Prompts
+:link: ai_config/template_prompts
+:link-type: doc
+
+Learn to create and use template prompts for influencing the AI's responses.
+:::
+
+::::
+2
 ## Data Intake
 
 ::::{grid} 1 2 2 3
@@ -140,6 +182,7 @@ Learn how to perform custom actions with callbacks.
 :hidden:
 :maxdepth: 1
 
+Configuring Lumen AI<ai_config/index>
 Data Intake<data_intake/index>
 Data Processing<data_processing/index>
 Visualize and Deploy<data_visualization/index>