feat: add how it works section (#1773)

This PR adds a short "how it works" section to guidance and includes a
mention to the outlines library that enables grammars/tools


*and a small formatting change

---------

Co-authored-by: Mishig <mishig.davaadorj@coloradocollege.edu>

docs/source/conceptual/guidance.md

@@ -12,6 +12,10 @@ Before we jump into the deep end, ensure your system is using TGI version `1.4.3
 
 If you're not up to date, grab the latest version and let's get started!
 
+## How it works
+
+TGI leverages the [outlines](https://github.com/outlines-dev/outlines) library to efficiently parse and compile the grammatical structures and tools specified by users. This integration transforms the defined grammars into an intermediate representation that acts as a framework to guide and constrain content generation, ensuring that outputs adhere to the specified grammatical rules.
+
 ## Table of Contents 📚
 
 ### Grammar and Constraints
@@ -270,7 +274,7 @@ curl localhost:3000/v1/chat/completions \
 <details>
   <summary>Tools used in example below</summary>
 
-  ```python
+```python
   tools = [
       {
           "type": "function",
@@ -321,7 +325,7 @@ curl localhost:3000/v1/chat/completions \
           },
       }
   ]
-  ```
+```
 
 </details>