docs(feature_flags): initial skeleton

Author: heitorlessa

docs/utilities/feature_flags.md

@@ -0,0 +1,24 @@
+---
+title: Feature flags
+description: Utility
+---
+
+The feature flags utility provides a simple rule engine to define when one or multiple features should be enabled depending on the input.
+
+!!! tip "For simpler use cases where a feature is simply on or off for all users, use [Parameters](parameters.md) utility instead."
+
+## Key features
+
+* Define simple feature flags to dynamically decide when to enable a feature
+
+
+## TODO
+
+* Review param names and UX
+	- Deep dive on naming - AppConfigFetcher vs ConfigurationStore vs SchemaFetcher
+	- How can we make it easier to get started
+* Getting started
+  	- Sample Infrastructure
+  	- Quickest way to start --- defaults, built-ins
+* Advanced section
+  	- Bring your own

mkdocs.yml

@@ -25,6 +25,7 @@ nav:
       - utilities/data_classes.md
       - utilities/parser.md
       - utilities/idempotency.md
+      - utilities/feature_flags.md
 
 theme:
   name: material