Added a description of the input system

fission/README.md

@@ -116,6 +116,8 @@ This Physics System is our interface with Jolt, ensuring objects are properly ha
 
 ### Input System
 
+The input system listens for and records key presses and joystick positions to be used by robots. It also maps robot behaviors (such as an arcade drivetrain or an arm) to specific keys through customizable input schemes.
+
 ### UI System
 
 ## Additional Systems
@@ -156,4 +158,4 @@ For basic user control of the mechanisms, we'll have a Synthesis Brain. By the e
 | `prettier:fix`       | Runs prettier on the project to fix any issues with formating.                                                          |
 | `format`             | Runs `prettier:fix` and `lint:fix`.                                                                                     |
 | `assetpack`          | Downloads the assetpack and unzips/installs it in the correct location.                                                 |
-| `playwright:install` | Downloads the playwright browsers.                                                                                      |
+| `playwright:install` | Downloads the playwright browsers.                                                                                      |