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/EngineCommands.tsx

@@ -2,7 +2,7 @@ import { CommandLog } from 'lang/std/engineConnection'
 import { engineCommandManager } from 'lib/singletons'
 import { useState, useEffect } from 'react'
 
-function useEngineCommands(): [CommandLog[], () => void] {
+export function useEngineCommands(): [CommandLog[], () => void] {
   const [engineCommands, setEngineCommands] = useState<CommandLog[]>(
     engineCommandManager.commandLogs
   )