Remove building scene, add code execution loading indicator to bottom-right controls (#3691)

* Remove isFirstRender because isExecuting means the same and remove building scene

* add small makefile util

* Remove waiting for building scene prompt

* Add a new model state indicator

* fmt lint tsc

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Co-authored-by: Frank Noirot <frank@kittycad.io>

src/components/FileTree.tsx

@@ -179,10 +179,7 @@ const FileTreeItem = ({
       codeManager.writeToFile()
 
       // Prevent seeing the model built one piece at a time when changing files
-      kclManager.isFirstRender = true
-      kclManager.executeCode(true).then(() => {
-        kclManager.isFirstRender = false
-      })
+      kclManager.executeCode(true)
     } else {
       // Let the lsp servers know we closed a file.
       onFileClose(currentFile?.path || null, project?.path || null)