Add docs for How-To Write Rule-Based Tests (#5052)

* initial document

* Improved how-to docs

* Add missing cards to how-to/index.md

* nits

* add tips

* fix spelling

* typo

Author: thomas-bc

docs/how-to/index.md

@@ -43,4 +43,93 @@ How-To guides offer step-by-step instructions for specific development tasks in
 
     [View Porting Guide](porting-guide.md){ .md-button .md-button--primary }
 
+
+-   <span class="card-title">__Implement a Framing Protocol__</span>
+
+    ---
+
+    This guide shows you how to implement a custom framing protocol in F Prime flight software and integrate it with the F Prime GDS.
+
+    [View Implement a Framing Protocol](custom-framing.md){ .md-button .md-button--primary }
+
+-   <span class="card-title">__Generate Data Products__</span>
+
+    ---
+
+    This guide shows you when to use data products, how to generate them, how to test them, and how to integrate them into your topology and ground system.
+
+    [View Generate Data Products](data-products.md){ .md-button .md-button--primary }
+
+-   <span class="card-title">__Define State Machines__</span>
+
+    ---
+
+    This guide shows you how to define and use state machines in F Prime with FPP so complex component behavior is explicit, testable, and maintainable.
+
+    [View Define State Machines](define-state-machines.md){ .md-button .md-button--primary }
+
+-   <span class="card-title">__Create Ground-Derived Channels__</span>
+
+    ---
+
+    This guide shows you how to compute telemetry-derived values on the ground and publish them through the F Prime GDS plugin system.
+
+    [View Create Ground-Derived Channels](derive-channels-on-ground.md){ .md-button .md-button--primary }
+
+-   <span class="card-title">__Develop a Device Driver__</span>
+
+    ---
+
+    This guide shows you how to build a new device driver in F Prime using the application-manager-driver pattern.
+
+    [View Develop a Device Driver](develop-device-driver.md){ .md-button .md-button--primary }
+
+-   <span class="card-title">__Develop a Subtopology__</span>
+
+    ---
+
+    This guide shows you how to organize reusable topology architecture into subtopologies that can be imported into deployments.
+
+    [View Develop a Subtopology](develop-subtopologies.md){ .md-button .md-button--primary }
+
+-   <span class="card-title">__Implement an OS Abstraction Layer__</span>
+
+    ---
+
+    This guide shows you how to implement a new OS Abstraction Layer for F´ so the framework can run on another operating system.
+
+    [View Implement an OS Abstraction Layer](implement-osal.md){ .md-button .md-button--primary }
+
+-   <span class="card-title">__Implement a Radio Manager Component__</span>
+
+    ---
+
+    This guide shows you how to implement a radio manager component using the communications adapter interface.
+
+    [View Implement a Radio Manager Component](implement-radio-manager.md){ .md-button .md-button--primary }
+
+-   <span class="card-title">__Develop Components in Python__</span>
+
+    ---
+
+    This guide shows you how to develop Python-based F Prime applications and integrate Python components into a larger system.
+
+    [View Develop Components in Python](python-development.md){ .md-button .md-button--primary }
+
+-   <span class="card-title">__Write Rule-Based Tests__</span>
+
+    ---
+
+    This guide shows you how to write rule-based unit tests for F Prime components using the RuleDemo example component.
+
+    [View Write Rule-Based Tests](rule-based-testing.md){ .md-button .md-button--primary }
+
+-   <span class="card-title">__Test-Driven Development__</span>
+
+    ---
+
+    This guide shows you a practical test-driven development loop for building an F´ component from model to implementation.
+
+    [View Test-Driven Development](test-driven-development.md){ .md-button .md-button--primary }
+
 </div>