Update onboarding to be more complete (#551)

* Update Introduction

* Update Camera step

* Change link to expectations

Co-authored-by: Josh Gomez <114548659+jgomez720@users.noreply.github.com>

* Set outline for onboarding

* Add Streaming step

* Remove Units step

* Add default kcl script

* Add Code Editor step

* Add Parametric Modeling step

* Add Interactive Numbers step

* Update bracket to use sqrt

* Add Command K step

* Assuage @jessfraz's code itchies

* Add User Menu step

* Add Project Menu step

* Add Export step

* Improve error page to actually show error

* Update the sketch step

* Add Future Work section

* Bring back the bracket code on the final step

* Set up the code to the bracket when starting onboarding

* Fix missing import

* Don't throw away users code if not empty

* Prompt the user if they have content in their file

---------

Co-authored-by: Josh Gomez <114548659+jgomez720@users.noreply.github.com>

src/App.tsx

@@ -117,12 +117,13 @@ export function App() {
     }
   })
 
-  const paneOpacity =
-    onboardingStatus === onboardingPaths.CAMERA
-      ? 'opacity-20'
-      : didDragInStream
-      ? 'opacity-40'
-      : ''
+  const paneOpacity = [onboardingPaths.CAMERA, onboardingPaths.STREAMING].some(
+    (p) => p === onboardingStatus
+  )
+    ? 'opacity-20'
+    : didDragInStream
+    ? 'opacity-40'
+    : ''
 
   // Use file code loaded from disk
   // on mount, and overwrite any locally-stored code
@@ -255,7 +256,7 @@ export function App() {
             'hover:bg-liquid-30/40 dark:hover:bg-liquid-10/40 bg-transparent transition-colors duration-100 transition-ease-out delay-100',
         }}
       >
-        <div className="h-full flex flex-col justify-between">
+        <div id="code-pane" className="h-full flex flex-col justify-between">
           <CollapsiblePanel
             title="Code"
             icon={faCode}